1) Install the F-Droid app.
2) Open this link on your mobile device. OR scan this QR code:
3) Choose F-Droid, then click Just Once.
4) When the Add new repository screen appears, click Add.
5) Wait for the repo to refresh. (Should only take a second unless F-Droid needs to update the main repo first)
6) Open de.corona.tracing in F-Droid to go directly to the app page (or search for Corona Tracing)