Kontalk Messenger

Kontalk is a free, secure instant messenger for text, image, and voice messages. Your phone number is your ID—no usernames or passwords needed. It auto-finds contacts, offers end-to-end encryption, and supports multiple devices. Built on open standards (XMPP, OpenPGP), it’s fully open-source. Donations keep it running. Follow @kontalknet for updates. Avoid installing on SD cards. Carrier fees may apply.