Calculator Lock - Photo Vault vs Obscura Photo Vault

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.

Obscura Photo Vault stores photos and videos in encrypted vaults on iOS. It uses AES-256-GCM and derives vault keys with 600,000 rounds of PBKDF2-HMAC-SHA256. The maker says the app functions without network access, has no server or account system, and gathers no installation, usage, or analytics data. It provides ten encrypted vault slots, Face ID and Touch ID unlocking, configurable auto-lock, delays after failed attempts, and memory clearing when a vault locks. Photo tools include editing, collages, tags, favorites, manual arrangement, duplicate detection, and Live Photo frame extraction. Users can import from their camera roll and export a vault as a password-protected encrypted.obscura file. Vault data is included in iCloud Backup by default and remains encrypted there. The maker says the indistinguishability property for hidden vaults applies only within stated threat-model bounds. The free plan allows up to 50 photos in one vault. Pro Monthly is $6.99 a month; Pro Yearly is $29.99 a year after a 7-day free trial; Pro Lifetime is $39.99, paid once payment. Forgotten passwords cannot be recovered.