Private, on-device AI for your photos, notes, contacts, passwords, translation, and more. Zero cloud. Zero tracking. Your data stays yours.
What it does
Privora runs a local large language model — Gemma 4 — entirely on the handset. Photo search, note handling, contacts, password storage and translation all work without a network connection, because none of the processing leaves the device. There is no server to trust, because there is no server.
It is published on Google Play and the source is public, so both halves of the claim can be checked independently.
How the data is protected
Everything is encrypted end-to-end. Transfers between your own devices go over your local network on Wi-Fi only, never via an intermediary. There is no telemetry to disable and no account to create.
For situations where merely having the app on your phone is the risk, Privora ships a calculator-disguise mode — the app presents as a working calculator — and a duress PIN that opens a decoy state rather than your real data.
Architecture
What "encrypted and on-device" actually means here, for anyone who would rather read the specifics than the adjectives.
- Cipher — AES-256-GCM. Authenticated, so tampering with ciphertext is detected rather than silently decrypted into garbage.
- Key custody — data keys are wrapped by the hardware-backed Android Keystore, so the unwrapped key never exists in application memory the app can hand over.
- Unlock — the PIN is stretched with PBKDF2 rather than used as key material directly, so a short PIN is not a short key.
- Storage — SQLCipher. The database file itself is encrypted at rest, not just the values inside it, so metadata and indexes are covered too.
- Face detection — YuNet, executed through ONNX Runtime.
- OCR — Tesseract 5.
- Translation — offline, across 15 languages.
No Google Play Services. No ML Kit. Both were removed rather than made optional — they are the usual route by which an otherwise offline app still reaches the network, and dropping them is also what makes the build eligible for F-Droid.
Open source
Privora is released under AGPL-3.0. Privacy claims that cannot be inspected are just marketing, so the source is public and the licence keeps it that way.
Platforms
Android is available now on Google Play. iOS, Windows and Linux are on the roadmap.