A Google user
This app may look simple but it's easy to use and most importantly it can re-test you on your incorrect answers, which makes it a lot easier to commit it to memory. The games have options for any level of difficulty. One of the games can be played with a friend to see which person can answer the fastest.
24 people found this review helpful
A Google user
I purchased this version from the free version to unlock the mode with the '!' over it. When I paid and downloaded the paid version, the mode with the '!' over it had disappeared. So basically I paid to unlock a certain mode, and then said mode disappeared after I purchased. If they solve the issue I will buy again.
19 people found this review helpful