The payment is one-time. You can use it as long as you don't delete it. This app includes all 4rd grade math topics.
Instead of focusing heavily on tests, the app emphasizes doing math consciously by entering answers using the keyboard.
There are unlimited operations in the application.
Unlimited operations in the app
Value of a digit - Place value review (unlimited)
Convert to/from a number (unlimited)
Rounding: up to tens place, up to hundred place ( unlimited )
Number sequences (unlimited)
Addition (unlimited)
Subtraction (unlimited)
Multiplication (unlimited)
Division (unlimited)
Time - Units of volume (unlimited)
Length (unlimited)
Moneys – Weights (unlimited)