Total 552 problems to solve.
Tap 4 numbers and operators to write a fomula and get the result as 10.
Real time calculation while tapping.
Skip to tap "Forward" button, if numbers looks difficult to solve. It'll come back later to let you try again.
Top bar (dark yellow) indicates how many have been solved.
Second top bar (yellow) suggests difficulty of current problems.
Share your solution with your friends or ask help to your friends with Twitter, Facebook or iMessage.
With Family Sharing set up, up to six family members can use this app.