A private, offline-first, multi-currency expense manager for Android. No account, no cloud: your financial data never leaves your device.
Wallet Logger is an expense manager for Android built around one decision: your financial data belongs to you and nobody else. Every transaction lives in a local SQLite database and nothing is ever uploaded. No account, no analytics, no server. Log income, expenses, and transfers in any currency and the app converts to your main unit on the fly using a stored rate while preserving the original amount. The tricky part is currency migration: when you change your main currency, every stored rate, transaction, and account balance needs to update together or balances silently drift. Wallet Logger handles this inside a single atomic SQL transaction so the operation either completes fully or not at all. Snapshot-based records mean expenses stay readable even after you delete the account or category they belonged to. On top sits a statistics engine with month, year, and all-time views, a spending calendar, and donut, bar, and trend charts built from scratch with no charting libraries. Built with React Native on Expo's New Architecture and shipped as a standalone APK.