RFB by BlinkIt
Concept business ideation exploring how hyperlocal quick commerce infrastructure can power instant phone re-commerce.
12
compe
7 days
duration
14
screens
SPARK Ideation Challenge Winner 2025 🏆
SMART WAY TO SELL.
SMARTER WAY TO EARN.
What if Blinkit — already inside millions of daily routines — could also become the fastest, most trusted place to sell your old phone? This is Rfb. A resale experience built natively into quick commerce.
TRUSTED SELLERS ✅
INSTANT PICKUP 📦
QUICK CASH 💰
SMART WAY TO SELL.
SMARTER WAY TO EARN.
SMART WAY TO SELL.
SMARTER WAY TO EARN.
TRUSTED SELLER ✅
INSTANT PICKUP 📦
QUICK CASH 💰
Research
A gap worth designing for
The brief asked us to find a meaningful gap in an existing product — not a surface fix, but a genuine extension of its ecosystem. We explored multiple apps across categories with two lenses: small gaps with large creative opportunity, and "what if" scenarios that unlock fresh thinking.
The approach
Identify products where functional gaps are small but the creative potential is large — then find the "what if" that connects them.
Quick commerce
Quick commerce is the next frontier of high-frequency user behaviour — the perfect space for embedding entirely new habits.
Why Blinkit
~50% quick-commerce market share, millions of daily opens, and a logistics network already built for speed and trust.
The "what if"
What if Blinkit's trust and infrastructure — built for groceries — became the foundation for a hyper-reliable resale marketplace?
The platform already has users’ trust
Blinkit isn't just a delivery app — it's India's highest-frequency commerce habit. We're embedding resale right into that loop.
Trust Layer
Enter your device details and get an AI-powered instant quote — right inside BlinkIt.
Doorstep pickup
A Blinkit rider picks up your phone just like any delivery — verified & insured.
Quality check
Device is inspected at the dark store. Transparent grading with photo evidence.
Instant payout
Cash to your UPI or Blinkit wallet credit. Spend it immediately on your next order.
The data made the case
With the stakeholders using a common dashboard, it was imperative to identify the distinct needs of the Global Directors and General Managers, while also showing where their focus areas overlap—capturing both individual requirements and the common insights they rely on.
Drawer Economy
70% of Indian household hoard 2–3 unused phones — a massive untapped value sitting in drawers.
Source: Economic Times
Dominant market share
~50% quick-commerce market share. Blinkit is already where millions of Indians shop every single day.
Source: MoneyControl
E-waste disposal
e-waste disposal is growing fast in Tier-1 cities but remains a challenge in infrastructure and participation.
Source: ScienceDirect
Market Size Projection
$ 219 bn
India’s refurbished & re-commerce industry by 2033
$ 1.52 B
2024
$ 10 B
2026
$ 219 B
2033
Source: Hindustan Times
THE CORE INSIGHT
Existing resale platforms — OLX, Facebook Marketplace — are eroding trust. Scams, price discrepancies, long payment cycles, and poor service are universal complaints. Blinkit already solves all of these structurally: verified networks, instant payment rails, and a logistics layer built for speed. The opportunity isn't just a new feature — it's a fundamentally better resale experience.
Pain Points
- Scam & fraud
- No oversight
- Long payment cycles
- Buyer authenticity
- Price discrepancies
- Poor service
IMPACT
Design decisions
With the key pain points & requirement identified, our next step was to pick the right approach to solve the challenges. Leveraging on reviews & feedback sessions from the stakeholders, we were able to add business value and make a strong impact.
A tab, not a feature buried in a menu
The Resell tab sits in the primary navigation — the same level as Home and Categories. This wasn't just a placement choice; it's a statement about intent. Rfb needed to feel like a first-class citizen, not an afterthought.
👉🏽
Blinkit's existing nav already has a "Print" tab, proving the pattern accepts new high-intent actions. Resell has far higher utility frequency than Print — it earns its spot.
Wallet credit as the hero payout option
Users can choose UPI payout or Blinkit wallet credit. The wallet option gets a +5% bonus — nudging users to reinvest in the Blinkit ecosystem while making the financial motivator immediately tangible.
👉🏽
Financial motivation is key. Cashify and Instacash proved that competitive instant payouts drive seller behaviour. By keeping it inside Blinkit's wallet, you create a closed-loop habit: sell → earn → spend. This is stickiness by design.
Four steps.
Zero friction.
From drawer to cash — faster than a grocery order.
List your phone
Enter your device details and get an AI-powered instant quote — right inside BlinkIt.
Doorstep pickup
A BlinkIt rider picks up your phone just like any delivery — verified & insured.
Quality check
Device is inspected at the dark store. Transparent grading with photo evidence.
Quick payout
Cash to your UPI or BlinkIt wallet credit. Spend it immediately on your next order.
Eight reasons.One ecosystem.
Everything that makes Rfb different from any resale platform you've seen before.
Instant Convenience
BlinkIt already means speed and trust. Rfb inherits that instantly — no separate app, no new learning curve.
Instant Cashback
Sell and get paid to your UPI or BlinkIt wallet credit immediately.
Trust & Safety
Every transaction is backed by BlinkIt's verified network.
Seamless Exchange
Trade in your old phone and upgrade — all in one flow.
Brand Trust + UX
Clean, familiar interface with zero onboarding friction.
Hyperlocal
Dark store infrastructure enables fast, secure, local transactions.
Everyday Ecosystem
Integrated into your daily shopping habit. Resale becomes routine.
Sustainability
Reduce e-waste. Extend device life. Easy, meaningful impact.
PROTOTYPE
Try it yourself.
When the functional gaps are small, innovation must come from reimagining the experience, extending the ecosystem, and pairing existing ideas with new ones.
Key takeaways.
Winning this challenge reinforced a way of thinking I want to keep. It wasn't about adding the most features — it was about finding the right seam in an existing product and pulling on it.
01
Constraints sharpen ideas
Having to work within BlinkIt's existing UI patterns forced better decisions than a blank canvas would have.
02
Trust is a design material
The real value of Rfb isn't speed — it's that BlinkIt already owns trust. Designing around that made every interaction cheaper to justify to the user.
03
Incentive design matters
The wallet credit +5% bonus was a small UX decision with large behavioural implications. Financial nudges deserve as much design attention as visual ones.
04
Data tells half the story
The market numbers ($219B by 2033) validated the opportunity. But the real insight came from asking why people weren't selling already — the answer was always friction and distrust.
05
Sustainability needs to be effortless
Users won't go out of their way to be sustainable. But if recycling a phone takes the same effort as ordering groceries, they will. Design the shortcut.
06
Ship the story, not just the screens
The presentation mattered as much as the prototype. Articulating the "why" behind each decision — not just the "what" — is what made it resonate with the judges.
RFB by BlinkIt
Concept business ideation exploring how hyperlocal quick commerce infrastructure can power instant phone re-commerce.
12
teams
7 days
duration
14
screens
SPARK Ideation Challenge Winner 2025 🏆
SMART WAY TO SELL.
SMARTER WAY TO EARN.
What if Blinkit — already inside millions of daily routines — could also become the fastest, most trusted place to sell your old phone? This is Rfb. A resale experience built natively into quick commerce.
TRUSTED SELLERS ✅
INSTANT PICKUP 📦
QUICK CASH 💰
Research
A gap worth designing for
The brief asked us to find a meaningful gap in an existing product — not a surface fix, but a genuine extension of its ecosystem. We explored multiple apps across categories with two lenses: small gaps with large creative opportunity, and "what if" scenarios that unlock fresh thinking.
The approach
Identify products where functional gaps are small but the creative potential is large — then find the "what if" that connects them.
Quick commerce
Quick commerce is the next frontier of high-frequency user behaviour — the perfect space for embedding entirely new habits.
Why Blinkit
~50% quick-commerce market share, millions of daily opens, and a logistics network already built for speed and trust.
The "what if"
What if Blinkit's trust and infrastructure — built for groceries — became the foundation for a hyper-reliable resale marketplace?
The platform already has users’ trust
Blinkit isn't just a delivery app — it's India's highest-frequency commerce habit. We're embedding resale right into that loop.
Trust Layer
Blinkit is already trusted for payments, deliveries, and speed — making it a highly credible space for high-value resale transactions.
Habit Loops
Millions open Blinkit multiple times a week. New features drop directly into an existing habit loop.
Logistics
Fast pickup, secure transfer, and instant valuation — built in.
Market Share
Dominant quick-commerce position means instant adoption and strong conversion.
The data made the case
With the stakeholders using a common dashboard, it was imperative to identify the distinct needs of the Global Directors and General Managers, while also showing where their focus areas overlap—capturing both individual requirements and the common insights they rely on.
Drawer Economy
70% of Indian household hoard 2–3 unused phones — a massive untapped value sitting in drawers.
Source: Economic Times
Dominant market share
~50% quick-commerce market share. Blinkit is already where millions of Indians shop every single day.
Source: MoneyControl
E-waste disposal
e-waste disposal is growing fast in Tier-1 cities but remains a challenge in infrastructure and participation.
Source: ScienceDirect
Market Size Projection
$ 219 bn
India’s refurbished & re-commerce industry by 2033
$ 1.52 B
2024
$ 10 B
2026
$ 219 B
2033
Source: Hindustan Times
THE CORE INSIGHT
Existing resale platforms — OLX, Facebook Marketplace — are eroding trust. Scams, price discrepancies, long payment cycles, and poor service are universal complaints. Blinkit already solves all of these structurally: verified networks, instant payment rails, and a logistics layer built for speed. The opportunity isn't just a new feature — it's a fundamentally better resale experience.
Pain Points
- Scam & fraud
- No oversight
- Long payment cycles
- Buyer authenticity
- Price discrepancies
- Poor service
IMPACT
Design decisions
With the key pain points & requirement identified, our next step was to pick the right approach to solve the challenges. Leveraging on reviews & feedback sessions from the stakeholders, we were able to add business value and make a strong impact.
A tab, not a feature buried in a menu
The Resell tab sits in the primary navigation — the same level as Home and Categories. This wasn't just a placement choice; it's a statement about intent. Rfb needed to feel like a first-class citizen, not an afterthought.
👉🏽
Blinkit's existing nav already has a "Print" tab, proving the pattern accepts new high-intent actions. Resell has far higher utility frequency than Print — it earns its spot.
Wallet credit as the hero payout option
Users can choose UPI payout or Blinkit wallet credit. The wallet option gets a +5% bonus — nudging users to reinvest in the Blinkit ecosystem while making the financial motivator immediately tangible.
👉🏽
Financial motivation is key. Cashify and Instacash proved that competitive instant payouts drive seller behaviour. By keeping it inside Blinkit's wallet, you create a closed-loop habit: sell → earn → spend. This is stickiness by design.
Four steps.
Zero friction.
From drawer to cash — faster than a grocery order.
List your phone
Enter your device details and get an AI-powered instant quote — right inside BlinkIt.
Doorstep pickup
A BlinkIt rider picks up your phone just like any delivery — verified & insured.
Quality check
Device is inspected at the dark store. Transparent grading with photo evidence.
Quick payout
Cash to your UPI or BlinkIt wallet credit. Spend it immediately on your next order.
Eight reasons.One ecosystem.
Everything that makes Rfb different from any resale platform you've seen before.
Instant Convenience
BlinkIt already means speed and trust. Rfb inherits that instantly — no separate app, no new learning curve.
Instant Cashback
Sell and get paid to your UPI or BlinkIt wallet credit immediately.
Trust & Safety
Every transaction is backed by BlinkIt's verified network.
Seamless Exchange
Trade in your old phone and upgrade — all in one flow.
Brand Trust + UX
Clean, familiar interface with zero onboarding friction.
Hyperlocal
Dark store infrastructure enables fast, secure, local transactions.
Everyday Ecosystem
Integrated into your daily shopping habit. Resale becomes routine.
Sustainability
Reduce e-waste. Extend device life. Easy, meaningful impact.
PROTOTYPE
Try it yourself.
When the functional gaps are small, innovation must come from reimagining the experience, extending the ecosystem, and pairing existing ideas with new ones.
Key takeaways.
Winning this challenge reinforced a way of thinking I want to keep. It wasn't about adding the most features — it was about finding the right seam in an existing product and pulling on it.
01
Constraints sharpen ideas
Having to work within BlinkIt's existing UI patterns forced better decisions than a blank canvas would have.
02
Trust is a design material
The real value of Rfb isn't speed — it's that BlinkIt already owns trust. Designing around that made every interaction cheaper to justify to the user.
03
Incentive design matters
The wallet credit +5% bonus was a small UX decision with large behavioural implications. Financial nudges deserve as much design attention as visual ones.
04
Data tells half the story
The market numbers ($219B by 2033) validated the opportunity. But the real insight came from asking why people weren't selling already — the answer was always friction and distrust.
05
Sustainability needs to be effortless
Users won't go out of their way to be sustainable. But if recycling a phone takes the same effort as ordering groceries, they will. Design the shortcut.
06
Ship the story, not just the screens
The presentation mattered as much as the prototype. Articulating the "why" behind each decision — not just the "what" — is what made it resonate with the judges.
RFB by BlinkIt
Concept business ideation exploring how hyperlocal quick commerce infrastructure can power instant phone re-commerce.
12
teams
7 days
duration
14
screens
SPARK Ideation Challenge Winner 2025 🏆
SMART WAY TO SELL.
SMARTER WAY TO EARN.
What if Blinkit — already inside millions of daily routines — could also become the fastest, most trusted place to sell your old phone? This is Rfb. A resale experience built natively into quick commerce.
TRUSTED SELLERS ✅
INSTANT PICKUP 📦
QUICK CASH 💰
Research
A gap worth designing for
The brief asked us to find a meaningful gap in an existing product — not a surface fix, but a genuine extension of its ecosystem. We explored multiple apps across categories with two lenses: small gaps with large creative opportunity, and "what if" scenarios that unlock fresh thinking.
The approach
Identify products where functional gaps are small but the creative potential is large — then find the "what if" that connects them.
Quick commerce
Quick commerce is the next frontier of high-frequency user behaviour — the perfect space for embedding entirely new habits.
Why Blinkit
~50% quick-commerce market share, millions of daily opens, and a logistics network already built for speed and trust.
The "what if"
What if Blinkit's trust and infrastructure — built for groceries — became the foundation for a hyper-reliable resale marketplace?
The platform already has users’ trust
Blinkit isn't just a delivery app — it's India's highest-frequency commerce habit.
We're embedding resale right into that loop.
Trust Layer
Enter your device details and get an AI-powered instant quote — right inside BlinkIt.
Doorstep pickup
A Blinkit rider picks up your phone just like any delivery — verified & insured.
Quality check
Device is inspected at the dark store. Transparent grading with photo evidence.
Instant payout
Cash to your UPI or Blinkit wallet credit. Spend it immediately on your next order.
The data made the case
With the stakeholders using a common dashboard, it was imperative to identify the distinct needs of the Global Directors and General Managers, while also showing where their focus areas overlap—capturing both individual requirements and the common insights they rely on.
Drawer Economy
70% of Indian household hoard 2–3 unused phones — a massive untapped value sitting in drawers.
Source: Economic Times
Dominant market share
~50% quick-commerce market share. Blinkit is already where millions of Indians shop every single day.
Source: MoneyControl
E-waste disposal
e-waste disposal is growing fast in Tier-1 cities but remains a challenge in infrastructure and participation.
Source: ScienceDirect
Market Size Projection
$ 219 bn
India’s refurbished & re-commerce industry by 2033
$ 1.52 B
2024
$ 10 B
2026
$ 219 B
2033
Source: Hindustan Times
THE CORE INSIGHT
Existing resale platforms — OLX, Facebook Marketplace — are eroding trust. Scams, price discrepancies, long payment cycles, and poor service are universal complaints. Blinkit already solves all of these structurally: verified networks, instant payment rails, and a logistics layer built for speed. The opportunity isn't just a new feature — it's a fundamentally better resale experience.
Pain Points
- Scam & fraud
- No oversight
- Long payment cycles
- Buyer authenticity
- Price discrepancies
- Poor service
IMPACT
Design decisions
With the key pain points & requirement identified, our next step was to pick the right approach to solve the challenges. Leveraging on reviews & feedback sessions from the stakeholders, we were able to add business value and make a strong impact.
A tab, not a feature buried in a menu
The Resell tab sits in the primary navigation — the same level as Home and Categories. This wasn't just a placement choice; it's a statement about intent. Rfb needed to feel like a first-class citizen, not an afterthought.
👉🏽
Blinkit's existing nav already has a "Print" tab, proving the pattern accepts new high-intent actions. Resell has far higher utility frequency than Print — it earns its spot.
Wallet credit as the hero payout option
Users can choose UPI payout or Blinkit wallet credit. The wallet option gets a +5% bonus — nudging users to reinvest in the Blinkit ecosystem while making the financial motivator immediately tangible.
👉🏽
Financial motivation is key. Cashify and Instacash proved that competitive instant payouts drive seller behaviour. By keeping it inside Blinkit's wallet, you create a closed-loop habit: sell → earn → spend. This is stickiness by design.
Four steps. Zero friction.
From drawer to cash — faster than a grocery order.
List your phone
Enter your device details and get an AI-powered instant quote — right inside BlinkIt.
Doorstep pickup
A BlinkIt rider picks up your phone just like any delivery — verified & insured.
Quality check
Device is inspected at the dark store. Transparent grading with photo evidence.
Quick payout
Cash to your UPI or BlinkIt wallet credit. Spend it immediately on your next order.
Eight reasons. One ecosystem.
Everything that makes Rfb different from any resale platform you've seen before.
Instant Convenience
BlinkIt already means speed and trust. Rfb inherits that instantly — no separate app, no new learning curve.
Instant
Cashback
Sell and get paid to your UPI or BlinkIt wallet credit immediately.
Trust & Safety
Every transaction is backed by BlinkIt's verified network.
Seamless Exchange
Trade in your old phone and upgrade — all in one flow.
Brand Trust + UX
Clean, familiar interface with zero onboarding friction.
Hyperlocal
Dark store infrastructure enables fast, secure, local transactions.
Everyday Ecosystem
Integrated into your daily shopping habit. Resale becomes routine.
Sustainability
Reduce e-waste. Extend device life. Easy, meaningful impact.
PROTOTYPE
Try it yourself.
When the functional gaps are small, innovation must come from reimagining the experience, extending the ecosystem, and pairing existing ideas with new ones.
Key takeaways.
Winning this challenge reinforced a way of thinking I want to keep. It wasn't about adding the most features — it was about finding the right seam in an existing product and pulling on it.
01
Constraints sharpen ideas
Having to work within Blinkit's existing UI patterns forced better decisions than a blank canvas would have.
02
Trust is a design material
The real value of Rfb isn't speed — it's that Blinkit already owns trust. Designing around that made every interaction cheaper to justify to the user.
03
Incentive design matters
The wallet credit +5% bonus was a small UX decision with large behavioural implications. Financial nudges deserve as much design attention as visual ones.
04
Data tells half the story
The market numbers ($219B by 2033) validated the opportunity. But the real insight came from asking why people weren't selling already — the answer was always friction and distrust.
05
Sustainability needs to be effortless
Users won't go out of their way to be sustainable. But if recycling a phone takes the same effort as ordering groceries, they will. Design the shortcut.
06
Ship the story, not just the screens
The presentation mattered as much as the prototype. Articulating the "why" behind each decision — not just the "what" — is what made it resonate with the judges.
RFB by BlinkIt
Concept business ideation exploring how hyperlocal quick commerce infrastructure can power instant phone re-commerce.
12
teams
7 days
duration
14
screens
SPARK Ideation Challenge Winner 2025 🏆
SMART WAY TO SELL.
SMARTER WAY TO EARN.
What if Blinkit — already inside millions of daily routines — could also become the fastest, most trusted place to sell your old phone? This is Rfb. A resale experience built natively into quick commerce.
TRUSTED SELLERS ✅
INSTANT PICKUP 📦
QUICK CASH 💰
Research
A gap worth designing for
The brief asked us to find a meaningful gap in an existing product — not a surface fix, but a genuine extension of its ecosystem. We explored multiple apps across categories with two lenses: small gaps with large creative opportunity, and "what if" scenarios that unlock fresh thinking.
The approach
Identify products where functional gaps are small but the creative potential is large — then find the "what if" that connects them.
Quick commerce
Quick commerce is the next frontier of high-frequency user behaviour — the perfect space for embedding entirely new habits.
Why Blinkit
~50% quick-commerce market share, millions of daily opens, and a logistics network already built for speed and trust.
The "what if"
What if Blinkit's trust and infrastructure — built for groceries — became the foundation for a hyper-reliable resale marketplace?
The platform already has users’ trust
Blinkit isn't just a delivery app — it's India's highest-frequency commerce habit.
We're embedding resale right into that loop.
Trust Layer
Blinkit is already trusted for payments, deliveries, and speed — making it a highly credible space for high-value resale transactions.
Habit Loops
Millions open Blinkit multiple times a week. New features drop directly into an existing habit loop.
Logistics
Fast pickup, secure transfer, and instant valuation — built in.
Market Share
Dominant quick-commerce position means instant adoption and strong conversion.
The data made the case
With the stakeholders using a common dashboard, it was imperative to identify the distinct needs of the Global Directors and General Managers, while also showing where their focus areas overlap—capturing both individual requirements and the common insights they rely on.
Drawer Economy
70% of Indian household hoard 2–3 unused phones — a massive untapped value sitting in drawers.
Source: Economic Times
Dominant market share
~50% quick-commerce market share. Blinkit is already where millions of Indians shop every single day.
Source: MoneyControl
E-waste disposal
e-waste disposal is growing fast in Tier-1 cities but remains a challenge in infrastructure and participation.
Source: ScienceDirect
Market Size Projection
$ 219 bn
India’s refurbished & re-commerce industry by 2033
$ 1.52 B
2024
$ 10 B
2026
$ 219 B
2033
Source: Hindustan Times
THE CORE INSIGHT
Existing resale platforms — OLX, Facebook Marketplace — are eroding trust. Scams, price discrepancies, long payment cycles, and poor service are universal complaints. Blinkit already solves all of these structurally: verified networks, instant payment rails, and a logistics layer built for speed. The opportunity isn't just a new feature — it's a fundamentally better resale experience.
Pain Points
- Scam & fraud
- No oversight
- Long payment cycles
- Buyer authenticity
- Price discrepancies
- Poor service
IMPACT
Design decisions
Every choice had to feel like it belonged in BlinkIt — not bolted on. Here are the key choices and the reasoning behind them.
A tab, not a feature buried in a menu
The Resell tab sits in the primary navigation — the same level as Home and Categories. This wasn't just a placement choice; it's a statement about intent. Rfb needed to feel like a first-class citizen, not an afterthought.
👉🏽
Blinkit's existing nav already has a "Print" tab, proving the pattern accepts new high-intent actions. Resell has far higher utility frequency than Print — it earns its spot.
Wallet credit as the hero payout option
Users can choose UPI payout or Blinkit wallet credit. The wallet option gets a +5% bonus — nudging users to reinvest in the Blinkit ecosystem while making the financial motivator immediately tangible.
👉🏽
Financial motivation is key. Cashify and Instacash proved that competitive instant payouts drive seller behaviour. By keeping it inside Blinkit's wallet, you create a closed-loop habit: sell → earn → spend. This is stickiness by design.
Four steps. Zero friction.
From drawer to cash — faster than a grocery order.
List your phone
Enter your device details and get an AI-powered instant quote — right inside BlinkIt.
Doorstep pickup
A BlinkIt rider picks up your phone just like any delivery — verified & insured.
Quality check
Device is inspected at the dark store. Transparent grading with photo evidence.
Quick payout
Cash to your UPI or Blinkit wallet credit. Spend it immediately on your next order.
Eight reasons. One ecosystem.
Everything that makes Rfb different from any resale platform you've seen before.
Instant Convenience
BlinkIt already means speed and trust. Rfb inherits that instantly — no separate app, no new learning curve.
Instant Cashback
Sell and get paid to your UPI or BlinkIt wallet credit immediately.
Trust & Safety
Every transaction is backed by Blinkit's verified network.
Seamless Exchange
Trade in your old phone and upgrade — all in one flow.
Brand Trust + UX
Clean, familiar interface with zero onboarding friction.
Hyperlocal
Dark store infrastructure enables fast, secure, local transactions.
Everyday Ecosystem
Integrated into your daily shopping habit. Resale becomes routine.
Sustainability
Reduce e-waste. Extend device life. Easy, meaningful impact.
PROTOTYPE
Try it yourself.
When the functional gaps are small, innovation must come from reimagining the experience, extending the ecosystem, and pairing existing ideas with new ones.
Key takeaways.
Winning this challenge reinforced a way of thinking I want to keep. It wasn't about adding the most features — it was about finding the right seam in an existing product and pulling on it.
01
Constraints sharpen ideas
Having to work within BlinkIt's existing UI patterns forced better decisions than a blank canvas would have.
02
Trust is a design material
The real value of Rfb isn't speed — it's that BlinkIt already owns trust. Designing around that made every interaction cheaper to justify to the user.
03
Incentive design matters
The wallet credit +5% bonus was a small UX decision with large behavioural implications. Financial nudges deserve as much design attention as visual ones.
04
Data tells half the story
The market numbers ($219B by 2033) validated the opportunity. But the real insight came from asking why people weren't selling already — the answer was always friction and distrust.
05
Sustainability needs to be effortless
Users won't go out of their way to be sustainable. But if recycling a phone takes the same effort as ordering groceries, they will. Design the shortcut.
06
Ship the story, not just the screens
The presentation mattered as much as the prototype. Articulating the "why" behind each decision — not just the "what" — is what made it resonate with the judges.
RFB by BlinkIt
Concept business ideation exploring how hyperlocal quick commerce infrastructure can power instant phone re-commerce.
12
teams
7 days
duration
14
screens
SPARK Ideation Challenge Winner 2025 🏆
SMART WAY TO SELL.
SMARTER WAY TO EARN.
What if Blinkit — already inside millions of daily routines — could also become the fastest, most trusted place to sell your old phone? This is Rfb. A resale experience built natively into quick commerce.
TRUSTED SELLER ✅
INSTANT PICKUP 📦
QUICK CASH 💰
SMART WAY TO SELL.
SMARTER WAY TO EARN.
SMART WAY TO SELL.
SMARTER WAY TO EARN.
TRUSTED SELLER ✅
INSTANT PICKUP 📦
QUICK CASH 💰
Research
A gap worth designing for
The brief asked us to find a meaningful gap in an existing product — not a surface fix, but a genuine extension of its ecosystem. We explored multiple apps across categories with two lenses: small gaps with large creative opportunity, and "what if" scenarios that unlock fresh thinking.
The approach
Identify products where functional gaps are small but the creative potential is large — then find the "what if" that connects them.
Quick commerce
Quick commerce is the next frontier of high-frequency user behaviour — the perfect space for embedding entirely new habits.
Why Blinkit
~50% quick-commerce market share, millions of daily opens, and a logistics network already built for speed and trust.
The "what if"
What if Blinkit's trust and infrastructure — built for groceries — became the foundation for a hyper-reliable resale marketplace?
The platform already has users’ trust
Blinkit isn't just a delivery app — it's India's highest-frequency commerce habit.
We're embedding resale right into that loop.
Trust Layer
Enter your device details and get an AI-powered instant quote — right inside BlinkIt.
Doorstep pickup
A Blinkit rider picks up your phone just like any delivery — verified & insured.
Quality check
Device is inspected at the dark store. Transparent grading with photo evidence.
Instant payout
Cash to your UPI or Blinkit wallet credit. Spend it immediately on your next order.
The data made the case
With the stakeholders using a common dashboard, it was imperative to identify the distinct needs of the Global Directors and General Managers, while also showing where their focus areas overlap—capturing both individual requirements and the common insights they rely on.
Drawer Economy
70% of Indian household hoard 2–3 unused phones — a massive untapped value sitting in drawers.
Source: Economic Times
Dominant market share
~50% quick-commerce market share. Blinkit is already where millions of Indians shop every single day.
Source: MoneyControl
E-waste disposal
e-waste disposal is growing fast in Tier-1 cities but remains a challenge in infrastructure and participation.
Source: ScienceDirect
Market Size Projection
$ 219 bn
India’s refurbished & re-commerce industry by 2033
$ 1.52 B
2024
$ 10 B
2026
$ 219 B
2033
Source: Hindustan Times
THE CORE INSIGHT
Existing resale platforms — OLX, Facebook Marketplace — are eroding trust. Scams, price discrepancies, long payment cycles, and poor service are universal complaints. Blinkit already solves all of these structurally: verified networks, instant payment rails, and a logistics layer built for speed. The opportunity isn't just a new feature — it's a fundamentally better resale experience.
Pain Points
- Scam & fraud
- No oversight
- Long payment cycles
- Buyer authenticity
- Price discrepancies
- Poor service
IMPACT
Design decisions
With the key pain points & requirement identified, our next step was to pick the right approach to solve the challenges. Leveraging on reviews & feedback sessions from the stakeholders, we were able to add business value and make a strong impact.
A tab, not a feature buried in a menu
The Resell tab sits in the primary navigation — the same level as Home and Categories. This wasn't just a placement choice; it's a statement about intent. Rfb needed to feel like a first-class citizen, not an afterthought.
👉🏽
Blinkit's existing nav already has a "Print" tab, proving the pattern accepts new high-intent actions. Resell has far higher utility frequency than Print — it earns its spot.
Wallet credit as the hero payout option
Users can choose UPI payout or Blinkit wallet credit. The wallet option gets a +5% bonus — nudging users to reinvest in the Blinkit ecosystem while making the financial motivator immediately tangible.
👉🏽
Financial motivation is key. Cashify and Instacash proved that competitive instant payouts drive seller behaviour. By keeping it inside Blinkit's wallet, you create a closed-loop habit: sell → earn → spend. This is stickiness by design.
Four steps. Zero friction.
From drawer to cash — faster than a grocery order.
List your phone
Enter your device details and get an AI-powered instant quote — right inside BlinkIt.
Doorstep pickup
A BlinkIt rider picks up your phone just like any delivery — verified & insured.
Quality check
Device is inspected at the dark store. Transparent grading with photo evidence.
Quick payout
Cash to your UPI or BlinkIt wallet credit. Spend it immediately on your next order.
Eight reasons. One ecosystem.
Everything that makes Rfb different from any resale platform you've seen before.
Instant Convenience
BlinkIt already means speed and trust. Rfb inherits that instantly — no separate app, no new learning curve.
Instant Cashback
Sell and get paid to your UPI or BlinkIt wallet credit immediately.
Trust & Safety
Every transaction is backed by Blinkit's verified network.
Seamless Exchange
Trade in your old phone and upgrade — all in one flow.
Brand Trust + UX
Clean, familiar interface with zero onboarding friction.
Hyperlocal
Dark store infrastructure enables fast, secure, local transactions.
Everyday Ecosystem
Integrated into your daily shopping habit. Resale becomes routine.
Sustainability
Reduce e-waste. Extend device life. Easy, meaningful impact.
PROTOTYPE
Try it yourself.
When the functional gaps are small, innovation must come from reimagining the experience, extending the ecosystem, and pairing existing ideas with new ones.
Key takeaways.
Winning this challenge reinforced a way of thinking I want to keep. It wasn't about adding the most features — it was about finding the right seam in an existing product and pulling on it.
01
Constraints sharpen ideas
Having to work within BlinkIt's existing UI patterns forced better decisions than a blank canvas would have.
02
Trust is a design material
The real value of Rfb isn't speed — it's that BlinkIt already owns trust. Designing around that made every interaction cheaper to justify to the user.
03
Incentive design matters
The wallet credit +5% bonus was a small UX decision with large behavioural implications. Financial nudges deserve as much design attention as visual ones.
04
Data tells half the story
The market numbers ($219B by 2033) validated the opportunity. But the real insight came from asking why people weren't selling already — the answer was always friction and distrust.
05
Sustainability needs to be effortless
Users won't go out of their way to be sustainable. But if recycling a phone takes the same effort as ordering groceries, they will. Design the shortcut.
06
Ship the story, not just the screens
The presentation mattered as much as the prototype. Articulating the "why" behind each decision — not just the "what" — is what made it resonate with the judges.