Features

PDF, EPUB, PKPass (Apple Wallet passes), CBZ/CBR comics, images, and Markdown notes.

AES-256-GCM per-file encryption; master key wrapped via Argon2id + AES-256 Key Wrap (RFC 3394).

Even with the device unlocked, content can't be read without your password.

Zero internet permission — your documents never leave the device.

Grid/list views, filters, favorites, reading-progress indicators, and full-text FTS5 search.

Single encrypted .librecrate-backup file verified by your password.

Security model

LayerMechanism

Key derivationArgon2id (19 MiB memory, 2 iterations, 2 parallelism)

Key wrappingAES-256 Key Wrap (RFC 3394)

File encryptionAES-256-GCM (12-byte IV, 128-bit tag)

Password modeMaster key wrapped with password-derived key; device key deleted

Device-key modeMaster key wrapped with per-device AES key (no password)

LockClears in-memory master key when backgrounded; requires password re-entry

BackupEncrypted Zip bundle with wrapped master key + DB + files

No Google Play Services, Firebase, Crashlytics, or AdMob. Zero proprietary dependencies.

Free and open source (AGPL-3.0). Download the Android APK or the Linux/macOS/Windows desktop binaries from GitHub Releases:

Get it on GitHub View source

F-Droid listing in review — no Google Play Services, no proprietary SDKs.

git clone https://github.com/DavidNeurieder/librecrate
cd librecrate
./gradlew assembleDebug

APK at app/build/outputs/apk/debug/app-debug.apk. Desktop: cargo build --release --package librecrate (CLI) or librecrate-gui (GUI).