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$1.99 at time of review
Video Review:

Sums Stacker

Age Level: Ages 5-8, Ages 8-12
By Developer: Carstens Studios Inc.

2010 Parents' Choice Gold Award winner - Parents' Choice Foundation
Editor's Choice Award for Excellence in Design - Children's Technology Review

This award-winning app is all about addition and subtraction puzzles that help to develop "number sense", mathematical problem solving and critical thinking skills.

I can tell you that after playing this game for a bit, in several different languages and math skills, that it REALLY does get you thinking and problem solving! It is quite challenging, even in the easy mode. But, it didn't take me long to start thinking with the different languages and symbols, which are provided for you in the game. So yes, math solving and a whole lot more!

There is a LOT packed into this little app and the design and interface is stellar!

Compatible with iPhone, iPod touch, and iPad.


  • Drag the values to match the sums
  • Use the following options: dice, fingers, hole tiles, ten frames, tally marks (English & Spanish)
  • Or, numerals in Arabic Roman, Chinese, Gurmukhi, Hebrew, Hindi, Binary, Braille, English and Spanish
  • And last, but not least, Polygons, US coins, US dollars, area fractions, bar fractions and at random. Shew!
  • There are 3 different modes to play in
  • Solve Mode lets the player strategically solve five random sets in the fewest number of moves
  • Infinity mode lets you play as long as you like
  • Race mode is where you solve puzzles for points in as short a time as possible - against the clock
  • Use the easy mode, where all the sums are provided, or
  • Hard mode, where two of the sums are provided, but the third is not

Video Review

Screen Shots