I recently deployed an android app to the play store. The client noticed that the app's title was not correct in the app list so I ended up changing it by modifying the android:label in both the application node as well as the activity node for the launcher activity. My question is, should the client have to re-install the app or not? I can't seem to find a concrete answer to this and they claim they had to re-install the app in order to get the icon title to update. Simply updating the app through the Google Play store did not fix the issue.
EDIT TO CLARIFY:
I am not referring to the store listing. I am referring to the title just below the app icon when viewing the list of apps installed on the phone. The customer is claiming that performing an update through the Google Play store did not fix this, but uninstalling and reinstalling the application manually did.
My question is, should the client have to re-install the app or not?
Any change you made to the app requires installation of new build for users too see the change on their devices, but there's no need to reinstall (uninstall and fresh install) and ordinary upgrade (so app data remains unaffected) perfectly suffices.
EDIT
"But there's no need to full reinstall (uninstall and fresh install)"
this is what the client is claiming they had to do
There's insufficient information and my experience tells that customers often claim nonsenses (or they simply do not understand the difference between upgrade/reinstall), still there's also a chance Launcher your user uses is buggy or somehow affected (i.e. I just spotted possible bug with quite popular Nova, that is also not showing one app label correctly). IMHO there's nothing you should bother here.