Sums In Space (free) description
Defend your spaceship with math! Destroy asteroids with a correct answer and get the highest score of today!
'Sums In Space' has been developed for children of primary schools but it's also fun if you're a bit older. It has has four categories of exercises.
The free version of 'Sums In Space' can only be played on the easiest level.
Note: This app might not work on some old devices as a GPU is required.