Android App for Daily Savings

I need an Android-only mobile application that lets my field agents record daily “pigmy” savings quickly and store everything in one place. Each agent will unlock the app with a simple PIN code; no other sign-in methods are required... (Budget: ₹750 - ₹1250 INR, Jobs: Android, Android App Development, Android SDK, Java, Kotlin, Mobile App Development, Mobile Development, MySQL)