Mobile Crypto Wallet Development
Budget: $750 – $1,500 USD
Project Goal
Build a mobile-first digital payments app that allows users to send, store, convert, and spend crypto-backed USD with extreme simplicity, comparable to Zelle or Venmo — while crypto remains largely invisible to the user.
Core Principle:
“It should feel like a normal money app, powered by crypto in the background.”
⸻
Target Platforms
• iOS
• Android
• Backend server
• Admin dashboard (web)
⸻
Core MVP Functionality
1. User Authentication
Required:
• Phone number signup
• SMS verification
• Optional email backup
• PIN or Face ID login
• Secure session management
System must:
• Prevent duplicate accounts
• Securely encrypt user credentials
⸻
2. Automatic Wallet Creation
Upon signup, the system must:
• Automatically create a BTC wallet
• Automatically create a USDC wallet
• Automatically create a USD ledger balance
• Link wallets to the user’s phone number identity
Users should not need to understand crypto at any point.
⸻
3. Home Dashboard
Displays:
• USD available balance
• BTC holdings (optional tab)
• Recent transactions
Action buttons:
• Send
• Request
• Add Cash
• Withdraw
• Convert
• Rewards
UX Priority:
Clean, fast, and minimal taps.
⸻
4. Send / Receive Money
Users can send money using:
• Phone number
• Contact list
Flow:
1. Enter amount in USD
2. Select recipient
3. Confirm
4. Funds transfer instantly
5. Recipient sees updated balance
Backend logic must:
• Auto-convert crypto to USD if needed
• Log all transactions
• Prevent double spending
• Notify both sender and receiver
⸻
5. Add Cash / Withdraw Cash
Add Cash options:
• Bank account
• Debit card
• Manual test funding (for MVP)
Withdraw options:
• Bank account
• Card cash-out
System must display status:
• Pending
• Completed
• Failed
⸻
6. Crypto ↔ USD Conversion Engine
Users must be able to:
• Convert BTC → USD
• Convert USDC → USD
• Convert USD → BTC
Must display:
• Live exchange rate
• Fees or spread
• Final amount preview
• Confirmation screen
⸻
7. Apple Pay / Card Spending (MVP Level)
Phase 1 acceptable implementations:
• Virtual card integration
• Simulated spending environment
• API-based card issuing (Stripe, Marqeta, or similar)
Logic:
• If spending USD, auto-convert crypto if needed
• Deduct balance in real time
⸻
8. Transaction History
Users must see:
• Date
• Amount
• Type (Send, Receive, Convert, Spend)
• Status (Completed, Pending, Failed)
• Transaction ID
⸻
9. Rewards / Incentives Module
MVP features:
• Cashback in BTC or USD
• Rewards tracker
• Loyalty tier placeholder
Admin controls:
• Enable or disable rewards
• Adjust reward percentage
⸻
Security Requirements
System must include:
• Encrypted sensitive data
• Secure wallet key storage
• No private keys exposed to the frontend
• Secure admin login
• Transaction logs
• Fraud flag placeholder
⸻
Admin Dashboard (Backend Panel)
Admins must be able to:
User Management
• View users
• Search by phone or email
• View balances
• Freeze or unfreeze accounts
Transaction Monitoring
• View all transactions
• Filter by type and status
• Export CSV reports
Analytics
• Daily transaction volume
• User growth metrics
• Conversion volume
• Revenue tracking
Rewards Control
• Set cashback percentage
• Enable or disable campaigns
⸻
Compliance (MVP Level)
Must include:
• Basic KYC API integration OR manual identity verification placeholder
• Terms and Privacy acceptance
• Activity logs
⸻
Performance Requirements
• App load time under 3 seconds
• No major lag
• No crashes
• Smooth UI animations
• Stable API responses
⸻
Design & UX Standards
The app must feel:
• Premium
• Modern
• Fintech-grade
• Non-generic
• Not template-based
• Comparable in polish to Stripe, Cash App, or Revolut
Rejected if:
• UI looks generic
• Flows feel clunky
• Fonts or spacing look amateur
• Screens feel unfinished
⸻
Deliverables Required from Developers
Code Ownership
• Full frontend source code
• Full backend source code
• Admin panel source code
• Database schema
• API documentation
Documentation
• Deployment instructions
• Environment setup guide
• API references
• Admin usage guide
⸻
Milestone Delivery Rules
Each milestone must include:
• A live demo
• Fully working features
• No fake mockups
• No placeholder logic disguised as real functionality
If it does not work, it does not pass.
⸻
Success Criteria
The MVP is approved only if:
• Users can sign up successfully
• Wallets auto-generate
• Money can be sent and received
• Conversion functions correctly
• Transactions log accurately
• Admins can monitor system activity
• UI feels premium and production-ready
⸻
Founder Final Note
This MVP is intended to be:
• A real functional product, not a concept demo
• A foundation for scaling into a full fintech platform
• Built with serious quality standards
Build a mobile-first digital payments app that allows users to send, store, convert, and spend crypto-backed USD with extreme simplicity, comparable to Zelle or Venmo — while crypto remains largely invisible to the user.
Core Principle:
“It should feel like a normal money app, powered by crypto in the background.”
⸻
Target Platforms
• iOS
• Android
• Backend server
• Admin dashboard (web)
⸻
Core MVP Functionality
1. User Authentication
Required:
• Phone number signup
• SMS verification
• Optional email backup
• PIN or Face ID login
• Secure session management
System must:
• Prevent duplicate accounts
• Securely encrypt user credentials
⸻
2. Automatic Wallet Creation
Upon signup, the system must:
• Automatically create a BTC wallet
• Automatically create a USDC wallet
• Automatically create a USD ledger balance
• Link wallets to the user’s phone number identity
Users should not need to understand crypto at any point.
⸻
3. Home Dashboard
Displays:
• USD available balance
• BTC holdings (optional tab)
• Recent transactions
Action buttons:
• Send
• Request
• Add Cash
• Withdraw
• Convert
• Rewards
UX Priority:
Clean, fast, and minimal taps.
⸻
4. Send / Receive Money
Users can send money using:
• Phone number
• Contact list
Flow:
1. Enter amount in USD
2. Select recipient
3. Confirm
4. Funds transfer instantly
5. Recipient sees updated balance
Backend logic must:
• Auto-convert crypto to USD if needed
• Log all transactions
• Prevent double spending
• Notify both sender and receiver
⸻
5. Add Cash / Withdraw Cash
Add Cash options:
• Bank account
• Debit card
• Manual test funding (for MVP)
Withdraw options:
• Bank account
• Card cash-out
System must display status:
• Pending
• Completed
• Failed
⸻
6. Crypto ↔ USD Conversion Engine
Users must be able to:
• Convert BTC → USD
• Convert USDC → USD
• Convert USD → BTC
Must display:
• Live exchange rate
• Fees or spread
• Final amount preview
• Confirmation screen
⸻
7. Apple Pay / Card Spending (MVP Level)
Phase 1 acceptable implementations:
• Virtual card integration
• Simulated spending environment
• API-based card issuing (Stripe, Marqeta, or similar)
Logic:
• If spending USD, auto-convert crypto if needed
• Deduct balance in real time
⸻
8. Transaction History
Users must see:
• Date
• Amount
• Type (Send, Receive, Convert, Spend)
• Status (Completed, Pending, Failed)
• Transaction ID
⸻
9. Rewards / Incentives Module
MVP features:
• Cashback in BTC or USD
• Rewards tracker
• Loyalty tier placeholder
Admin controls:
• Enable or disable rewards
• Adjust reward percentage
⸻
Security Requirements
System must include:
• Encrypted sensitive data
• Secure wallet key storage
• No private keys exposed to the frontend
• Secure admin login
• Transaction logs
• Fraud flag placeholder
⸻
Admin Dashboard (Backend Panel)
Admins must be able to:
User Management
• View users
• Search by phone or email
• View balances
• Freeze or unfreeze accounts
Transaction Monitoring
• View all transactions
• Filter by type and status
• Export CSV reports
Analytics
• Daily transaction volume
• User growth metrics
• Conversion volume
• Revenue tracking
Rewards Control
• Set cashback percentage
• Enable or disable campaigns
⸻
Compliance (MVP Level)
Must include:
• Basic KYC API integration OR manual identity verification placeholder
• Terms and Privacy acceptance
• Activity logs
⸻
Performance Requirements
• App load time under 3 seconds
• No major lag
• No crashes
• Smooth UI animations
• Stable API responses
⸻
Design & UX Standards
The app must feel:
• Premium
• Modern
• Fintech-grade
• Non-generic
• Not template-based
• Comparable in polish to Stripe, Cash App, or Revolut
Rejected if:
• UI looks generic
• Flows feel clunky
• Fonts or spacing look amateur
• Screens feel unfinished
⸻
Deliverables Required from Developers
Code Ownership
• Full frontend source code
• Full backend source code
• Admin panel source code
• Database schema
• API documentation
Documentation
• Deployment instructions
• Environment setup guide
• API references
• Admin usage guide
⸻
Milestone Delivery Rules
Each milestone must include:
• A live demo
• Fully working features
• No fake mockups
• No placeholder logic disguised as real functionality
If it does not work, it does not pass.
⸻
Success Criteria
The MVP is approved only if:
• Users can sign up successfully
• Wallets auto-generate
• Money can be sent and received
• Conversion functions correctly
• Transactions log accurately
• Admins can monitor system activity
• UI feels premium and production-ready
⸻
Founder Final Note
This MVP is intended to be:
• A real functional product, not a concept demo
• A foundation for scaling into a full fintech platform
• Built with serious quality standards