The challenge

Ensuring banking-grade security and zero transaction loss under spotty mobile network conditions while maintaining a frictionless 3-tap checkout UX.

The approach

Biometric Authentication: Integrated iOS FaceID and Android BiometricPrompt with hardware-backed secure enclaves. Offline Transaction Queue: Queueing requests locally with idempotent UUID keys to prevent double-charging on network dropouts. Interactive Expense Categorization: Machine learning auto-categorization for user spending habits.

What we did

• //001Biometric Authentication
• //002Offline Transaction Queue
• //003Interactive Expense Categorization