Count 'n' Grow is a quick and addictive little trainer when it comes to exercise addition and/or subtraction.
"Math has never been so much fun before!" ✔
Originally targeted as a homework app for kids, it also helps to train your mind in a competitive, catchy way.

This is how it works:
You need to plant seeds on a field!
The aim of this game is to select the given number (engraved in stone) from the field either firsthand or broken down.
Careful: you are only allowed to make three mistakes per game!

The winner is who was the hardest worker cropping plants.

You need to hurry! After the first round your available time is
the time you needed to finish the previous round and so on –
so you will need to plant faster and faster from round to round!