There is some serious issue with this app. I had used coin miner apk, which generates 4 satoshis per minute, whereas this app generates 26 satoshis per min and I was astonished, but when you exit the app and open it, your balance will be zero again, like what the actual duck?! where are my 70 hours of Satoshi Worthing 0.01 btc? all lost? whereas in the coin miner it's slow but it's legit and the coins will be there in your app till u withdraw.