The app is really simple. You only need to know the rules and you can start planning. You need to add 1 to this number. After some time it starts to be harder. Try it what can be your best score.

 
Link to  Private Policy: https://www.termsfeed.com/live/7cd199ed-317d-4216-b452-9893eaa393c4
Contact on developer: ramimtier@gmail.com