3
Signal Alternative with SMS Support
(sh.itjust.works)
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
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That's my current setup, but Signal gets no use because I can't convince anyone to switch
When they dropped SMS support I went to qksms and SimpleX chat. I don't even have Signal anymore.
Sure was nice to have only one app.