It has since been taken off the Google Play Store in accordance with their updated policies, but I used to use an app called Crypto Miner by Jesus Oliver. That's legit -- actually mines... albeit very, VERY slowly, as everyone else in the thread has already noted.
It's highly unlikely that your mobile phone will hit a share that gets accepted by any mining pool, in other words, that app you mentioned or any other app for that matter does not really mine bitcoin, the most common thing they do is collect your data and sell it for marketing purposes, they get paid for it and pay you a small portion, there could be a few more ways they can make money of your phone resources, mining bitcoin isn't one of them, so just because an app pays you something (large or small) it does mean it actually mines bitcoin, it's most certainly doing something else that generates some sort of a revenue someway, somehow.
Disclaimer: I wouldn't recommend downloading any APK from external sources now. You never know what malware they've possibly been infected with. And now...
Jesus Oliver's app was pretty legit. I used it when I first discovered Bitcoin... never got any real income from it as I never hit the withdrawal limit, but I remember using it on slushpool and getting a tiny balance. Was pretty cool, back in the day. Nowadays? Maybe if the app mined an altcoin or the difficulty was really low, it might hit a share.
That being said, you are indeed correct that no doubt many of the apps that claim to mine Bitcoin or claim to mine cryptocurrency simply collect and sell data.
