As the poster above stated - It is definitely hidden caches. Try downloading Battery Doctor and running the Junk cleaner, or download PhoneClean on your computer.
PhoneClean has a free version available. And how many times did you run battery doctor - you need to run it 3-4 times.Battery Doctor did not find any cache junk files. PhoneClean requires paying
PhoneClean has a free version available. And how many times did you run battery doctor - you need to run it 3-4 times.
Nothing deletes app cache after iOS 8.3. Cleaning apps don't have access to apps anymore. The only way to fully delete app cache is delete the app and redownload it. But your problem isn't app cache, its iOS system cache. App cache would be accounted for in the populated list of apps and storage, iOS cache would not be accounted for, which is your problem. Your missing space that is not accounted for. So its iOS related, not app related.Well PhoneClean that I just downloaded does not delete app cache files in iOS 9 and I ran battery doctor 10 times and nothing was deleted.
Nothing deletes app cache after iOS 8.3. Cleaning apps don't have access to apps anymore. The only way to fully delete app cache is delete the app and redownload it. But your problem isn't app cache, its iOS system cache. App cache would be accounted for in the populated list of apps and storage, iOS cache would not be accounted for, which is your problem. Your missing space that is not accounted for. So its iOS related, not app related.