I need a lightweight expense-tracking app that works entirely offline. Users must be able to add, edit and delete individual expenses, assign each one at least to the “Entertainment” category, and instantly see the running total per category. The data should sit in local storage only—no external database or cloud sync. Core flow • Minimalist interface built with either React Native or Flutter • Android build is required; an iOS build is a welcome bonus if it doesn’t add complexity • Category handling ready for “Entertainment” today, but coded so Food or Transport can be switched on later without restructuring • Fast in-app search to locate past entries by keyword or amount • One-tap CSV export of the full expense list for easy backups When I open the app I expect it to load instantly, show a clean list of existing expenses, and let me add a new line item with amount, note and category in under five seconds. Totals should update in real time and remain accurate after I restart the app. Deliverables 1. Complete source code with clear project structure and comments 2. Release-ready APK (plus optional iOS build if produced) 3. Brief README covering local setup, build commands and how to extend categories No backend, no fancy theming—just a solid, offline-first expense tracker that feels snappy and uncluttered.