App Lock vs KryptEY
Side-by-side comparison of two open source alternatives
App Lock
Secure your sensitive apps with powerful biometric protection using AppLock! AppLock is a modern, open-source privacy tool designed to keep your sensitive apps safe. With a beautiful Material 3 Expressive interface and robust biometric security, AppLock ensures your data stays private — always on your device, never in the cloud. Features: * **Material You Design**: Seamlessly adapts to your system theme * **Biometric Unlock**: Use face unlock, fingerprint or PIN for fast, secure access * **Anti-uninstall**: Prevents unauthorized removal * **Unlock Timer**: Optional timer to keep apps unlocked for fixed time period after unlocking * **No Root required**: Works on all devices without root access * **One-tap protection**: Lock any app instantly * **Real-time monitoring**: Protects apps as they launch * **100% offline**: No ads, no trackers, no data collection Perfect for: * Privacy-conscious users wanting to secure sensitive apps * Securing banking, messaging, and social apps * Parents restricting access for children * Professionals protecting work apps App Lock is designed to be lightweight and efficient, with minimal battery impact. It runs entirely offline, ensuring your data remains private and secure. Built with Jetpack Compose and Material 3 for a smooth, intuitive experience. AppLock is free, open-source, and respects your privacy — always. Source code and issue tracker: https://github.com/PranavPurwar/AppLock
KryptEY
Communicate securely and independent, regardless of the legal situation or whether messengers use E2EE. No server needed. #ChatKontrolleStoppen Why KryptEY? Breaking of end-to-end encryption (E2EE) by laws such as the planned EU chat control is an ongoing issue. Content in messengers that use E2EE, such as Whatsapp or Signal, could thus be monitored by third parties. E2EE is often, but not always, standard in messengers. There are proven methods for E2EE such as PGP. However, these methods are sometimes cumbersomely integrated and require a lot of effort to use. KryptEY is an Android keyboard that implements the Signal protocol. The keyboard works messenger-independently and both the X3DH Key Agreement Protocol and the Double Ratchet Algorithm work without a server, thus it enables a highly independent use of the protocol. Features Based upon Simple Keyboard ( https://github.com/rkkr/simple-keyboard ), KryptEY adds a view above the Keyboard for the E2EE functionality. * use E2EE through Signal Protocol in any messenger * encryption/decryption of messages * enter message through separate text field in keyboard * use clipboard to read messages * manage contacts in own contact list in keyboard * message log to view sent/received messages * send messages as plain JSON (raw mode) or hidden in a decoy text (fairytale mode) * verification of E2EE functionality via fingerprint * Q&A View for questions * dark & light theme See https://github.com/amnesica/KryptEY/blob/master/KRYPTEY.md for further information on how KryptEY is working. Security The existing security properties for the Signal Protocol are also valid for the keyboard. Limitations The keyboard was designed as a POC and only allows 1-to-1 conversations. However, the application can also be used in a group chat to a limited extent. Here, a message can be directed to a specific chat partner and not to all people. Other participants of the group chat cannot decrypt the message. Text messages in Telegram are getting copied as HTML and not as plain text. When decoding the message with the fairytale mode the copied message is compromised and can't be read properly. Therefore, it can't be decoded at all. However, the raw mode works properly. When using KryptEY with Telegram we recommend the raw mode. Some messengers like Threema only allows up to 3500 bytes per message. Therefore, different character input limitations apply. To stay under the 3500 bytes limit, only 500 characters are allowed for raw and fairytale mode. For convenience these limitation applies for all messengers. Demo For a demonstration on how KryptEY is used see https://github.com/amnesica/KryptEY/tree/master#demo KryptEY was created by mellitopia and amnesica. The code is open source and can be found at https://github.com/amnesica/KryptEY
| Feature | App Lock | KryptEY |
|---|---|---|
| License | MIT | GPL-3.0-only |
| Install sources | F-DroidGitHubIzzyOnDroid | F-DroidGitHubIzzyOnDroid |
| Categories | Password ManagerProductivity | Password ManagerProductivityKeyboard |
| Features | Ad-FreeOpen SourceNo Tracking | Ad-FreeOpen SourceNo Tracking |
| Platforms | Android | Android |
| Website | ||
| Source code |