App Lock vs PilferShush Jammer
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
PilferShush Jammer
Features a passive jammer technique that engages the microphone thereby blocking other apps from using it. But does NOT listen to or record any of the audio from the microphone. It uses 0% CPU and no noticeable battery use. However is not intended to be left on permanently due to the variety of triggers that can cause audio_focus_state changes (VOIP etc). Also features an active jammer that emits tones constrained to the NUHF range of 18 kHz to 24 kHz range. User determined carrier frequency and drift limits with rate for random tone emissions depending on the device capabilities. For instance 20000 Hz carrier, drift limit 1000 Hz and rate slow - will output random frequency between 19 kHz and 21 kHz approximately every second. Audible artifacts are present during the NUHF tones but this may be changed in a future release. Experimental white noise output may not be very effective at blocking and is a somewhat annoying sound. The device speaker output may not have enough amplitude to block unwanted NUHF signals - testing will determine. * Manual start * Notification post when running * Auto stop and restart when telephony interrupts * Currently relies on audio_focus_state changes for auto-switching * Active jammer
| Feature | App Lock | PilferShush Jammer |
|---|---|---|
| License | MIT | Apache-2.0 |
| Install sources | F-DroidGitHubIzzyOnDroid | F-Droid |
| Categories | Password ManagerProductivity | Password ManagerProductivity |
| Features | Ad-FreeOpen SourceNo Tracking | Ad-FreeOpen SourceNo Tracking |
| Platforms | Android | Android |
| Website | ||
| Source code |