- http://chrisballinger.info/apps/chatsecure/ is an encrypted chat client for Android and iPhone.
- iPGMail (iOS): app to send and decrypt PGP-encoded messages.
- https://code.google.com/p/k9mail/ (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.
- DuckDuckGo Search and Stories (Android): Secure, anonymous searches with Tor/Orbot integration.
- https://play.google.com/store/apps/details?id=info.guardianproject.browser is an exceptionally privacy-focused web browser for Android, based on Tor.
- Encrypt your Android phone.
- http://www.cyanogenmod.org/about (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.
- https://play.google.com/store/apps/details?id=org.thialfihar.android.apg is an OpenPGP implementation for Android phones.