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How to revert to an earlier version of an app?
(lemmy.dbzer0.com)
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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IMHO you need to use adb to force install older version. Something like :
adb install -r -d myapp.apk
Look it up! It should be possible to use termux on phone and connect wirelessly to your own phone to access adb. Or you have to use another device to connect to your phone.
Of course simpler solution is being able to backup settings and data, uninstall then install older version and restore data.