Mostly apps you'll find for mobile devices are faucets, some are paying, some aren't. Mining isn't really profitable from a phone or tablet, will cost you more energy than what you'll earn.
I use an application called grabpoin that is able to provide me free Bitcoin without the need for bother because I just download the application and do the task then bitcoin free as much as 0.01 BTC will go to my bitcoin wallet address
0.01 btc a day? Really? Already been paid from this application?
I would like to see some proof of this actually paying out as this is extremely unlikely at this time, there have been apps previously that show that you are earning but when it actually comes to paying out it just doesn't happen, if the app you are using is legit then it must have a small userbase as it surely couldn't support payouts like that en masse.
Generally you will not find a legit app that can generate bitcoin without having to do something for it, clicking on ads / timed faucet.