Alien Investor

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Published Apps

Sachwert-Tresor Sachwert-Tresor is a local, encrypted vault for tracking your Bitcoin, gold and silver holdings. It runs fully offline — no cloud, no server, no telemetry, no price lookups over the network. Your data never leaves the device in plaintext. 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 v2.0) FLAG_SECURE: no screenshots, no screen recording, no preview in recents (v2.0) AES-256-GCM encryption, key via PBKDF2-SHA256 (600,000 iterations), native WebCrypto Optional 2FA (Aegis / TOTP, RFC 6238) with a self-contained QR encoder Bitcoin: buys, sells and withdrawals; gold and silver by count × denomination Multi-currency entries (EUR / USD / CHF), totals kept separate per currency — still zero network lookups (v2.1) Manual current-value calculation — you enter prices yourself, nothing is fetched Encrypted .vault backup, peer-to-peer sync via Syncthing (no cloud) CSV export compatible with the BTC tax tool (KYC / noKYC kept separate) Fully bilingual (German / English), offline in-app manual included Open source (MIT) — no third-party crypto, no external CDNs, no trackers
Ausgaben-Tracker 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.

Alien Fitness A minimal, fully offline workout tracker. No account, no server, no tracking — all your data stays on your device and never leaves it. Features: Create your own training plans: any exercise, sets, reps and rest — edit any time Ad-hoc free workouts: start empty, add exercises on the fly, save when done Built-in plans: strength (Push / Pull / Legs) and HIT (Tabata, Power) Live session logging with automatic rest timer, corrections supported Progress charts per exercise (max weight / reps over time) Exercise library with images, muscle groups and equipment JSON backup: export and import your history and plans to move between devices German and English interface, switchable in-app Dark neon UI, fully mobile-first Works completely offline. Built-in plans use bodyweight, pull-up bar and dumbbells — no gym required.

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