There are some apps which use mining on android.
...and you're better off staying away from them. I can assure you they're most likely duds. You also risk getting spyware on your device, which is especially disastrous if you're involved in crypto.
Even powerful gaming PCs are barely powerful enough for mining, so there's no way you can mine with a mobile device.
You could do something like this though lol:
https://motherboard.vice.com/en_us/article/3kvdv9/samsung-upcycling-galaxy-s5-bitcoin-mining-rigYou could have the power efficiency of
five whole PCs!!! /s
Edit: thanks for the info mocacinno!