Pitak

Pitak is a privacy-first, offline personal library catalogue. Catalogue your books, lend them to borrowers from an encrypted vault, keep a wishlist, import/export your data, make portable backups, and optionally publish a read-only library site.

Features:

* Library — add, edit, search, sort and filter books; soft-delete with restore; on-device cover capture; ISBN barcode scan with metadata lookup (Open Library → Google Books, chained and cached).
* Borrowers vault — a persistent, AES-256-GCM encrypted store for borrowers and loans, unlocked by a passphrase (Argon2id key derivation). Optional biometric unlock.
* Wishlist — track books to acquire; move them to the library on purchase.
* Import / Export — JSON, CSV (including Goodreads import), and paginated PDF export with Indic-script support.
* Backup / Restore — portable .pitabak archives.
* Publish — optionally push a read-only library viewer to GitHub Pages, with PII redaction.
* App-lock — optional biometric/device-credential gate before the library screen.

Privacy posture: local-first by default. Sensitive data lives in the platform Keystore; secrets are held as wipeable bytes. Network calls happen only on explicit user action (ISBN lookup, publish, opt-in remote covers). Screenshots are blocked while sensitive data is visible.

The cryptographic core is written in Rust and built entirely from source.

* Vault: key file written atomically (no loss on a crash mid change-passphrase); half-created vaults auto-cleaned; passphrase asked twice, 8+ chars; unlock errors shown again.
* Passphrase field: edits not at the end clear the field and say so (they used to corrupt the entry).
* Lending refused (with reason) for removed or fully-out books.
* Corrupt backups fail cleanly; imports update in place, all-or-nothing.
* Filter chips show the active filter; orphan images cleaned; auto-backup off.