Freaking Children Math - kids
https://play.google.com/store/apps/details?id=com.Simo49.freakngmaths
Description
Keep your mind healthy, test your mental math and exercise your brain once a day.
daily brain training exercises and math drills designed to enhance mental arithmetic.
https://play.google.com/store/apps/details?id=com.Simo49.freakngmaths
more !
https://play.google.com/store/apps/details?id=com.Simo49.AvionPilot