ChatSecure is an encrypted chat client for Android and iPhone. iPGMail (iOS): app to send and decrypt PGP-encoded messages. K-9 Mail (Android): open source mail app for android that supports PGP. Signal (Android): open source application for encrypted voice and text communications. SilentCircle (iOS, Android): encrypted voice, video, text, and file communications Telegram (iOS, Android, Windows Phone, PC, Mac, Linux): encrypted messaging Wickr (iOS, Android): encrypted, self-destructing text, picture, audio and video messages. Mobile Web DuckDuckGo Search and Stories (Android): Secure, anonymous searches with Tor/Orbot integration. Orbweb is an exceptionally privacy-focused web browser for Android, based on Tor. Other Mobile Resources Encrypt your Android phone. CyanogenMod open-source alternative: to avoid leaving your phone vulnerable to your carrier's customization of the Android OS, consider replacing the firmware (on select phone models) with CyanogenMod. APG is an OpenPGP implementation for Android phones.