1. NetGuard https://netguard.me/ - allows you to see which applications and where are sending data, as well as block unwanted data sending. The app does not require root access and allows you to block connections for both user and system apps. Source Code https://github.com/M66B/NetGuard/
2. Orbot https://guardianproject.info/apps/orbot/ - allows you to use the anonymous Tor network on Android and redirect traffic through it from other applications, incl. browser, mail, maps, etc. Great extension for enhancing online privacy. Source Code https://gitweb.torproject.org/orbot.git
3. XPrivacyLua https://lua.xprivacy.eu/ - an easy-to-use "privacy manager" XPrivacyLua solves the problem of excessive application permissions in an interesting way: instead of directly denying access (which often leads to application stops), it sends fake data instead of real ensuring user privacy. Source code https://github.com/M66B/XPrivacyLua
2. Orbot https://guardianproject.info/apps/orbot/ - allows you to use the anonymous Tor network on Android and redirect traffic through it from other applications, incl. browser, mail, maps, etc. Great extension for enhancing online privacy. Source Code https://gitweb.torproject.org/orbot.git
3. XPrivacyLua https://lua.xprivacy.eu/ - an easy-to-use "privacy manager" XPrivacyLua solves the problem of excessive application permissions in an interesting way: instead of directly denying access (which often leads to application stops), it sends fake data instead of real ensuring user privacy. Source code https://github.com/M66B/XPrivacyLua