: a personal library app for the books you already own / for iPhone & Android.
DESCRIPTION 1 personal library app : ISBN barcode scanner, cover grid, shelves, tags, lending ledger ; your library lives on your device, begins without an account.
NOTES Point the camera at an ISBN barcode and the book is shelved — title, author, cover. Mark a book lent, export your catalog, and remember who has what.
A barcode becomes a shelved book in about a second. Batch-scan a whole pile; fix odd metadata before it lands.
Libraries for home, office, the summer house. Tags and notes make a hundred spines searchable in seconds.
The lending ledger remembers who borrowed what, so shelves stop developing mysterious gaps.
Shelfmark is built for physical book collections: scan ISBN barcodes, add missing titles manually, search by author or tag, keep multiple libraries, record loans, and export your catalog as CSV or JSON when you need a backup.