Hi
Iām the founder of One Color Games. My first app Mental Math Expert is a new and modern take on the very old subject mental arithmetics. You can train what you like and your preferred number range, try to beat the story mode or just get challenged
For more information:
Mental Math Expert - One Color Games
Get the Android version here:
https://play.google.com/store/apps/details?id=com.OneColorGames.BrainMathExpert
If you would like to take a moment to review the app I will return your gesture, Iām happy to help you if you got any questions
Kind regards
Gunnar Hohlweg
One Color Games ApS