I was given an iOS legacy code. The tester can reproduce a strange issue, the application shows a Toast (Android) like message at the top of the screen which counts milliseconds, then disappears.
I was never able to see this thing, only in the videos recorded by the tester.
I was checking the code for all the possible iOS libs for Android like Toast, but no luck.
I also checked all the libraries one by one, none of them can do such thing.
I also tried to simply search for "ms" to find the label's string, couldn't find it.
I also tried to search for "CFBundleDisplayName" and "CFBundleName" to catch the app's name, which is also shown in the Toast like label, but found nothing.
This is getting very frustrating, I'm kind of starting to believe this thing is not coming from the app's code but from somewhere else, like an accessibility feature or a built in iOS debug feature, I don't know.
Here is a screenshot from a recorded video with some information about the phenomenon:
