This is project made mostly for educational reasons, but also for fun :). I followed youtube tutorial (https://www.youtube.com/watch?v=aurEgWxDfQQ&t=317s) made by chanel The Weekly Coder , which is really great and help me a lot to understand how everythink works. But it wouldnt be an achievement if I had only followed mindlessly the tutorial. That is why I tried add as much as I can from myself. So what are my improvements? Read it in . txt file. Here is my Android version https://drive.google.com/open?id=0B4BQS9HEZ9CzbzBnYkp3RlI1TzA .