AnkiDroid: Anki flashcards on Android. Your secret trick to achieve superhuman information retention.
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AnkiDroid: Anki flashcards on Android. Your secret trick to achieve superhuman information retention.
Multi-core VPN client for Android and desktop: Xray, sing-box, Psiphon, Tor, DNS tunnels, WireGuard/AmneziaWG, OpenConnect, IKEv2
Free library for identifying and fingerprinting Android devices. MIT license, no restrictions on usage in production.
AVault - Call Recorder (No Root Required) | Privacy-first, hardware-encrypted audio vault for Android 12-16+. Rootless call recording via Shizuku with AES-256-GCM, biometrics & auto-cleanup.
Particle clock created with Jetpack Compose framework
Open source Android, iOS and Web app for learning about and managing digital and physical security. From how to send a secure message to dealing with a kidnap. Umbrella has best practice guides in over 40 topics in multiple languages. Used daily by people working in high risk countries - journalists, activists, diplomats, business travelers etc.