* Device OS and version: Android 10 * Device model/manufacturer: Samsung Galaxy A10 * F-Droid version (in the _About_ screen): 1.13.1 * F-Droid privileged extension version (if installed): As an example, some time ago, I installed IceCatMobile. Since then, it appears to have been removed from the repo. F-droid doesn't tell me about that; it just doesn't provide any updates. That means I have probably been running unsupported, possibly insecure software, for an unknown time. I would like the F-droid client app to notice that an installed app has gone from the repo, and warn me, so that I can either choose to continue using it, knowing the risks, or choose to delete it (and find a replacement, if possible). I consider not knowing this to be a major security problem. Thanks, Richard