Parents' Guide to

King of 20

By Debbie Gorrell, Common Sense Media Reviewer

age 10+

Addictive math game teaches strategy over accuracy.

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Is It Any Good?

Our review:
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This game is a stimulating way for kids to practice math skills, but the instructions to ignore the order of operations and only use positive integers reduces its learning value. Creating the expressions is addictive, especially when they get longer as gameplay progresses, and it's helpful that kids get to experience math in a fun setting. However, more variation in the operation tiles would reduce frustration, as it gets fairly impossible later in the game if you can only subtract or create fractions. The computer opponent also requires a lot of "think" time, which might put off some kids (and adults). Improving the rules to better reflect mathematical accuracy would give kids more consistency between what they learn in school and in this engaging game, and polishing the user experience would improve the solid premise.

App Details

  • Devices: iPhone, iPod Touch, iPad
  • Subjects: Math: addition, arithmetic, division, multiplication, subtraction
  • Skills: Thinking & Reasoning: logic, solving puzzles, strategy, thinking critically
  • Pricing structure: Free
  • Release date: October 4, 2015
  • Category: Education
  • Publisher: Ishmael king
  • Version: 1.2.1
  • Minimum software requirements: iOS 6.0 or later
  • Last updated: December 10, 2020

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