Hi,
I can not install apk instructor.
F-Droid is not providing any install/uninstall button at the top.
If I look at the different versions, I can update, install or downgrade one.
That means f-droid thinks, there is another version if the apk already installed?
I have apk extractor not installed and it (as far as I know) never was.
Why f-droid does not offer an installation?
Device has android 7.0.
I can not install apk extractor, because f-droid says, it is installed with another sign key.
I do not know how this is possible.
Checked the list of installed apps, axp.tool.apkextractor is not available.
Pics of the details page?
So you say it doesn’t appear in Android Settings - Apps? So you can’t uninstall it?
Neither other tools like Netguard (which lists all the apps) can’t see it? Even if you enable show system apps?
No, I can not find this app anywhere.
@Licaon_Kter
How can I figure out what is going wrong, or could it be a f-droid bug?
Can you use ADB from a PC?
What does
adb shell pm list packages | grep apk
output?
@Licaon_Kter
yes, this command returns nothing, it is very confusing.
Anything else I can do to investigate this?
Was the signature process changed some time ago?
A lot of f-droid apps, are listed as “no version with compatible signature” signature. But maybe I installed it via google play.
Cleaned up some other unrelated apps I currently not need and now I can install apk extractor. 
???
Mistary :)) strange indeed…e
