Calculator Lock - Photo Vault vs Photok

Calculator Lock - Photo Vault is an Android privacy vault concealed behind a working calculator and opened with a 4-digit PIN. It stores photos, videos, audio, PDFs, files, and Secure Notes in encrypted app-private storage. Different PINs can open separate vaults without a visible session switcher. Users can search and pin encrypted notes, organize items in built-in folders, and restore deleted media or notes from Trash. The app displays photos, videos, audio, and PDF previews; unsupported files can be unlocked, exported, or shared. The maker describes screenshot protection and clipboard cleanup on sensitive flows. The free plan costs nothing and allows up to two personal vaults, with ads possibly appearing. There is no cloud backup or PIN recovery. Optional Intruder Detection may capture a front-camera photo after repeated failed attempts.

Photok is an Android vault for keeping private photos and videos away from ordinary view. Imported media can be organized into albums and exported, while files are encrypted locally with AES-256 and decrypted only in memory during use. Cloud upload is not required. Users can unlock with a fingerprint, share directly into the vault, hide the app icon, and delete originals after import. Encrypted backups can be created and restored. Photok is open source under the Apache 2.0 License and is developed by Leon Latsch and public volunteers. Downloads are listed for Google Play, F-Droid, and other alternatives. The maker describes the core app as identical across Google Play and FOSS variants, but telemetry defaults differ: enabled by default in Google Play and disabled by default in FOSS. The FOSS plan costs nothing; Photok Pro is an optional Google Play add-on with no listed price.