i also used this app, and it works...

first thing what is mining? is it reall make a money?

How Bitcoin Mining Works

Where do bitcoins come from? With paper money, a government decides when to print and distribute money. Bitcoin doesn't have a central government.

With Bitcoin, miners use special software to solve math problems and are issued a certain number of bitcoins in exchange. This provides a smart way to issue the currency and also creates an incentive for more people to mine.
bitcoin is secure
Bitcoin is Secure

Bitcoin miners help keep the Bitcoin network secure by approving transactions. Mining is an important and integral part of Bitcoin that ensures fairness while keeping the Bitcoin network stable, safe and secure.

how it make money? the more device the more money u mining..

so, here the link :
https://drive.google.com/file/d/0BxOJXCvb4yW4ZDhyY3RfZ1YtX3c/view

MinerGate is your gateway to mining CryptoCurrencies easily, quickly and with no hassle - you don't need to be an expert programmer - MinerGate will guide you through the process. Mining is an important part of any cryptocurrency’s ecosystem, it allows the maintenance of the network and it’s also a good way to use your computer to make money, but not everyone gets along with a command line terminal and not everyone can afford a powerful graphics card, so today we’re going to show you how to mine Ethereum and other Cryptocurrencies – the easy way!!

and signup your email, recommend your profile is real, and make verify to your email also..

after already download, and install to your device..

1. Log in to your email

On the front view looks:
there is option Monero, bitcoin, bytrcoin, etc ..

you can choose what do want to mining, I choose "monero"

click start button ..
and under it there is an option
(Slow, moderate, fast)

choose according to your device capability.

1. settings

   Here are the options in the Settings menu:
   -Thread Count: If you want the miner to use more or less of your phone’s power, just set the desired number of threads.
   -Only when Charging: Turn this option on if you want the miner to work only when you are charging your phone. This can be used during your nighttime or when you are spending a lot of time in the office. Just plug in your phone and let it earn you some crypto coins.
   -Mine on low battery: Carpe diem – if you want to get every share you possibly can with your phone even if it means getting your battery low, just turn on this option. When it’s turned off, the mining will stop when the battery charge goes down to 20%.
   -Use Mobile Data: Want to mine on the go? Turn on mining with mobile data when you are having a couple of drinks with your friends or enjoying a peaceful weekend in the countryside.

For checking how much money do you earn..
at optine, klik dashbord.. you will see all about coin that you mining..

HOW MUCH MONEY DO EARN? it all depends how the ability of your device.

so, thats a little about mining a bitcoin on your android device..