Installing Briar via F-Droid
1) Install the F-Droid app.
2) Open this link on your mobile device. The link should open in the F-Droid app.
Or scan this QR code on your phone:
3) When the Add new repository screen appears, click Add.
4) F-Droid will update the list of available apps. When it finishes, search for Briar in the F-Droid app.