A comprehensive Android demo app showcasing NFC, UPI, and Card payment methods with PIN security, haptic feedback, swipe gestures, and real-time validation. Built with Kotlin and Material Design.
android kotlin material-design payment mobile-app android-development nfc demo-app swipe-gestures payment-gateway secure-payments hacktoberfest upi android-nfc mobile-payment card-payment haptic-feedback real-time-validation pin-authentication payment-demo
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Updated
Sep 21, 2025 - Kotlin