Photok provides a private photo vault for Android, storing selected images behind an app interface.
Open source
24 alternativesPINCredible
PINCredible helps users remember PINs and other credentials through an Android app in the BackPack project.
About PINCredible
PINCredible is an open-source Android app for storing PINs on the device. It encrypts data locally using AES/GCM/NoPadding and obfuscates each PIN inside a table layout surrounded by secure random numbers, so the app does not know where in the pattern the user's PIN is located. PIN digits are entered on an in-app keyboard, with optional shuffling of the digit buttons to limit touch-location logging. The project lists no internet connection requirement, no ads and no suspicious permissions, and offers an accessible color palette based on the IBM Color Blindness Palette.
The app requires Android 8.0 (API level 26) or newer and uses the Android KeyStore. APK releases on F-Droid and GitHub are signed with the same key and can be verified with apksigner; a Google Play release is only planned. The developer states no liability for lost PINs and does not guarantee that the app will always work properly or that PINs will never be lost.
Key features
- Encrypts stored PIN data locally with AES/GCM/NoPadding
- Obfuscates each PIN inside a table of secure random numbers
- Uses an in-app keyboard for entering PIN digits
- Optional shuffling of digit buttons against touch-location logging
- Accessible color palette based on the IBM Color Blindness Palette
- Reports no internet connection, no ads and no suspicious permissions
Best for: Android users on Android 8.0 or newer who want an open-source, offline place to keep PINs.
Good for
- Open source, with APK releases on F-Droid and GitHub signed using the same key
- Local encryption and no internet connection requirement listed
- Uses XXH128 for PIN name hashing and Argon2id for backup password inputs
Watch out for
- Minimum supported Android version is API level 26, Android 8.0 (Oreo)
- Developer does not guarantee the app always works or that PINs are never lost
- Google Play release is only planned; pricing is not stated
PINCredible at a glance
- Category
- Mobile Apps › Android Apps
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Android
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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PINCredible FAQ
Which Android versions does the app support?
The minimum supported Android version is API level 26, Android 8.0 (Oreo). The app also relies on the Android KeyStore.
How can an APK release be verified?
F-Droid and GitHub APK releases are signed with the same key and can be checked with apksigner using the --print-certs option.
Does the app require an internet connection?
The feature comparison in the repository lists no internet connection requirement for PINCredible.
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