Without a third party cleaning app? (I don't recommend if you aren't technically inclined BTW, most are shit) you need to go in to your system settings, find the app in question, and clear cache and local storage before uninstalling.
this post was submitted on 01 Jul 2023
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I think what's happening is the app is using Android's account manager to store credentials. These are part of the system and not removed when an app is uninstalled.
If this is what's happening then you can go to "Passwords & accounts" in settings and find the account to remove. There really shouldn't be any data left over and you shouldn't need to clear app data and cache before uninstalling, the system takes good care of that when the app is uninstalled.
it depends per app, some store it as a file (that's rather hard to delete if you don't know where you're looking for), but most apps probably use Google login. Google login can act almost seamless and will give you the idea the app keeps logged in.
I appreciate your answer, but these weren't Google login situations. The instances I noticed were for Lemmy and Reddit apps.
Edit: I never used chrome for these, just DuckDuckGo, and I never saved credentials.
Do you have cloud backup turned on? If so, data might be saved and automatically restored from the cloud when you reinstall the app.
It is likely that the apps you uninstalled actually support automatic backup. When you uninstall an app that supports automatic backup, their data backed up into your Google account will be restored next time you reinstall them.
I think you can review those backups from the Google Drive app. Open Google Drive app, go to settings, then find "auto backup for apps / backup and reset". Mine says I have 79 apps backup with 99MB backup data in total. Not sure how to actually delete individual backup though. Some says if you delete the app from your play store download history, it'll clear the backup data, but can't verify it right now.
Try disabling the built-in android backup system? I'm just guessing here though.
Maybe you have another app installed with which the app in question can share logins?
I've noticed that some apps like those from Meta can somehow share logins. For example, if I have Facebook installed and logged in, and I install the Oculus app, it will prompt me to sign in with my Facebook account.
At least for me (grapheneos) when i uninstall an app it asks if i want to keep the apps data, and i always uncheck the box so it doesn't get saved. But @[email protected] is probably right, go to the app info and clear storage before uninstalling to totally wipe it
My only guess is that while you've deleted the app data, login credentials are still saved through either a Google or Samsung service. Or perhaps the phones is not removing the cache for those apps.
Go to chrome to the settings menu>security(?)>passwords to check Google saved passwords.
Samsung I think uses an app called Samsung Pass idk I don't use it on my S21 FE.
If it's that last, I guess clear system cache? Hard to clear cache for an app you no longer have. Maybe clear before uninstall? Would be in the app info menu for the specific app.