Hi
Am well aware of the fact that there are a lot of mining apps in the app store and at the same time many apps available on the Google apk. It is indeed very widespread and people do download it often but just let me ask you a small question.
if it was this easy to mine coins on mobile through apps , won't all of us would mine bitcoins the same way ? All of us would be miners.
These apps are not only lying to people but at the same time might be harmful for you! Do not download such apps. If you do want to mine some coins then try and make an investment in : Mining machine
There are a variety of them available ! Online even on amazon, quite a feat now. They are made in China mostly and transported to other countries. Therefore this would be the way to go if you do want to try things like this.

Again : do not give any permission to such apps , do not download such apps they might use your information.