You probably wondering how to mine bitcoin or any other crypto currrencies on your smartphone? Answer to this question is probably not. You might argue why not? there are so many crypto mining apps on playstore? but none of them actually mine any known crypto currencies. 

 A few months ago people used to use Minergate to mine several crypto coins but minergate is discontinued it's mining due to google policies. There is a browser based crypto mining app on playstore named cryptotab. Even this application ask you to download it's vpn in order to start mining. And you should start mining every 1 hour or two hours, or else it automatically stops.

If you choose to mine with this app irrespective of the hurdles, you hardly make any bitcoins which worth a few cents for mining whole month. 

Network based crypto mining apps like Pi, bee allow you to start mining but you get less than a dollar for two months of mining which doesn't worth your time. And it's mandatory to enter an Invitation code to use these apps. You can invite others to use these apps for commissions but still you do not make any decent coins.

So do not waste your time testing different mining apps on playstore, you only help the app makers make money but you do not make any coins. 

Note: Do not believe in stuff they show in screenshots. They are just misleading users to download their app.