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)
- Debts / liabilities (v1.6): note open payments with amount, due date and note,
tick them off, overdue items highlighted — optionally book a settled item as an expense - 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 — the import asks
for the backup's password and only replaces existing data once the backup opens (v1.7) - Settings tab (v1.7): auto-lock 0/1/5/15/30 min, lock now, change master password,
black (neon) or soft (navy) theme, manage your own categories, version display - Overview by category with search and category filter (v1.7)
- Built-in manual; German and English, follows the system language on first start,
switchable in-app - Alien-Investor family design (Orbitron / Share Tech Mono, bundled locally), mobile-first
Works completely offline — built entirely on native WebCrypto, no external dependencies.
Signing certificate SHA-256 (verify with AppVerifier), identical for every version:
DB:C5:08:71:53:B4:59:21:82:DD:13:1A:73:0C:11:A0:F7:12:4E:34:42:6C:54:2B:4B:A6:88:5A:B1:CC:01:0E
apksigner (no separators): dbc5087153b4592182dd131a730c11a0f7124e34426c542b4ba6885ab1cc010e