A minimal, fully offline personal expense tracker. No account, no server, no tracking
— all your data stays encrypted on your device and never leaves it.
Features:
- NO permissions at all — not even INTERNET. The OS itself guarantees the app
cannot phone home; verify it right in the APK manifest (since v1.5) - FLAG_SECURE: no screenshots, no screen recording, no preview in recents (v1.5)
- Monthly overview: fixed costs, variable expenses, comparison to previous month
- Annual overview (12-month table)
- Fixed-cost management (monthly / yearly, historically correct active/inactive state)
- CSV export (Excel / LibreOffice / Sheets) incl. a deduplicated fixed-cost summary
- Tax usage per fixed cost (private / business / partial)
- Encrypted vault: master password, AES-256-GCM, key via PBKDF2-SHA256 (600k iterations),
auto-lock after inactivity - Encrypted .vault backup: export and import to move between devices
- German and English interface, switchable in-app
- Dark neon UI, fully mobile-first
Works completely offline — built entirely on native WebCrypto, no external dependencies.