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?