Math 42

App review by
Ashley Kemper, Common Sense Media
Math 42 App Poster Image
Incredible step-by-step solving and quizzing tool.

Parents say

age 12+
Based on 1 review

Kids say

age 10+
Based on 1 review

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A lot or a little?

The parents' guide to what's in this app.

Educational Value

Great potential for adaptable learning. The tool meets users where they are and includes assessment questions with rationales for each topic included. Clearly addresses the procedures of math formulas, equations, and the like but leaves out some conceptual understanding (why concepts are related or build on one another).

Ease of Play

The interface is simple and distraction-free, but the lack of visuals may make it more difficult for all kids to interact successfully with the more complex math concepts.


Full features only available via in-app purchase.

Drinking, Drugs & Smoking

What parents need to know

Parents need to know that Math 42 has two very specific purposes: detailing how to solve equations, or training and assessing knowledge based on built-in problems. Kids can input any equation and watch the calculator-like platform show the step-by-step procedures to find the answer. Topics include computing with numbers, combining sums, products, simplifying powers, simplifying roots, computing with fractions, factoring, solving equations, computing derivations, and computing integrals. Although the topics included might be found in a 10-year-old's classroom, this tool seems like a better fit for older students because it's so text-heavy. In addition to English, Math 42 is available in French, German, Russian, Simplified Chinese, and Spanish. Read the app's privacy policy to find out more about the information collected and shared.

User Reviews

  • Parents say
  • Kids say
Adult Written byGamer4056 August 15, 2018
Teen, 13 years old Written byxxshadowxex June 19, 2017


i think this is a wonderful site

What's it about?

Using MATH 42, kids can solve their own math problems or use the built-in assessment tool to practice their math skills. If teens choose to input their own equations, they use the calculator-like platform to create their problem. Then, the app runs a query and lists the different ways to solve that problem. As kids click on the blue hyperlink, step-by-step instructions detail each part of the procedure. Kids can also select topics and use the built-in equations to practice. To solve practice problems, kids click on the graduation cap and select the type of problems they want to solve. After choosing from a multiple-choice list, teens can see each procedure for solving the problem. Users can click on the gear to adjust the level, adjust the topic, and show progress.

Is it any good?

Overall, this tool is great to have in the hands of kids learning math. Specifically, the varied approach to solving each problem and the breakdown of each procedure into steps make it especially great for users who forget a part. The built-in assessment feature is also simple to use and records success rates over time so kids can see their progress. Because the text can be dense, it's probably a better fit for young teens, but tweens who are strong readers might also benefit. It also seems like the text is translated from a different language, so the wording can be a bit awkward throughout. Ultimately, however, Math 42 might be a boost for kids who need extra help.

Talk to your kids about ...

  • Families can talk about how many ways there are to solve math problems. Using Math 42, insert an equation and see how many approaches the app tool uses to find each solution. As a family, discuss why it's important to look for multiple ways to solve problems, both in math and real life.

  • Challenge each other on various difficulty levels in the assessment portion of the app. Track growth each week to see how each family member improves over time.

App details

  • Device: Android
  • Subjects: Math: algebra, arithmetic, calculus, functions
  • Skills: Self-Direction: academic development, self-assessment
  • Price: Free
  • Pricing structure: Free (full features available via in-app purchase)
  • Release date: December 4, 2016
  • Category: Education
  • Topics: STEM, Numbers and Letters
  • Size: 36.80 MB
  • Publisher: Cogeon GmbH
  • Version: 3.1
  • Minimum software requirements: 5.1 and up
  • Last updated: July 31, 2019

Our editors recommend

For kids who love math and homework help

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