android app for offline upi payments using *99# service
A self-hostable, gateway-agnostic supporter page and tip jar for Indian developers. Bring your own payment gateway (Razorpay, UPI, Dodo) with zero platform fees.
NotifyUPI is an Android application that intercepts incoming payment notifications from UPI apps—like PhonePe and GPay—and automatically reads them aloud using text-to-speech.
A modern, feature-rich UPI QR code generator built with React, TypeScript, and Tailwind CSS.
Accept donations, payments, or tips via custom UPI links and buttons — no backend, no redirect. 📦 Simple JS library for creators, freelancers, indie devs, and service sellers.
⏱️ Station Management Platform — Session tracking, billing & monitoring for gaming lounges, co-working spaces, laundry mats, car washes, and any station-based business. FastAPI + Supabase + UPI payments.
Offline UPI Spending Analysis and Tracking by SMS and Notification
Nyaya AI — AI Legal Assistant for India. Upload any Indian legal document (FIR, legal notice, agreement, court order) and get a simple explanation, risk flags, deadlines & next steps in English, Hindi and Bengali. Free 3 analyses, Pro ₹299/mo. Built by THIRDJUNE.
An AI-powered UPI payment assistant with Agent Pay and Reserve Pay capabilities. Built with React, Node.js, and Google Gemini AI.
Mission-themed event registration platform with Supabase, payment capture, email confirmations, and admin tools.
⚡ Advanced Modular Telegram Account Shop Bot with Custom UI, Multi-Payment (UPI/Crypto), OTP System & Smart Must-Join Verification. Built with Telethon & SQLite.
Stripe-like Checkout for Direct UPI Payments. Zero fees. Zero gateway. React SDK.
Production-grade e-commerce platform built with Next.js 16, PostgreSQL, Drizzle ORM, native UPI payment integration, and admin management.
Revenue-integrity layer that plugs in under Razorpay — recovers failed payments with calibrated ML inside a bounded policy engine, and proves the incremental ₹ against a live randomized control. Measured, not estimated.
UPI payments platform using Spring Boot microservices, PostgreSQL (optimistic locking for concurrency control), and Kafka for async event-driven notifications. Implemented idempotency guarantees, JWT auth at the API gateway edge, and database-per-service isolation.
CampusRide is a full-stack campus ride-sharing platform with real-time driver matching, Expo mobile and web support, and UPI plus QR-based payment flow.
🌐 SETU — Zero-Internet Acoustic & Ultrasonic Mesh Relay Platform for Emergency SOS, Disaster Warning & Offline UPI Payments
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