5 stars: Great and simple to use interface. Also thanks for offering a discount!
5 stars: It helps to exercise your brain and to think twice about the answer but quick I highly recommend it
4 stars: This game is very good to get better at quick calculations. I was struggling a lot with quick calculations, but practicing them with this app helped me a lot.
4 stars: I enjoy it so far, but it's not five stars for me yet since you can't move it to an SD card. I only have so much room on my internal storage, so I'll probably end up uninstalling this. I'd rate higher if the devs let you change the storage. Disappointed really, it's pretty fun.
3 stars: Way too many ads. Too annoying when your aim is to exercise your brain and you are exposed to pointless ads. I understand to watch ad to gain extra lives, but when you decline you still have to watch it to get back to the main menu. I could play just one game, really liked it actually! Unfortunately I have to uninstall now.
2 stars: Its good but the ads make it so annoying!!!! -- Going from a 4 star to a 2 Star because the Ads are too overwhelming-- I mean I used to be able to play for a decent time before an ad came up -- Now is EVERY FREAKING MINUTE!!! --- AND the most annoying thing is that it forces you to see the ad -- you can't close it. Il start looking for a different app. I can't barely use this app anyways!!!!!!!
2 stars: While learning addition, it's asking me to substract in my head to get the righ...