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20/20 Primes and Factor Trees

20/20 Primes and Factor Trees

The tutor in your pocket.

1 ratings
12 reviews
📚 Education
🔍 Reference

Archived App (Last seen on 28 Jan 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • December 18, 2008
  • September 4, 2025

Developer

Walter Kissach
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iphone
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⭐12
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🔄6+ apps
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About

Master prime factorization, LCM, and GCD with this educational tool. It offers detailed step-by-step guidance using coaching calculators and comprehensive guides to enhance understanding.

✓Prime factorization by factor trees
✓LCM by prime factorization
✓LCM by listing multiples
✓GCD by prime factorization
✓GCD by listing divisors
✓Coaching calculators
✓Detailed step-by-step process
Show original description

What's New in 20/20 Primes and Factor Trees

9.1

September 4, 2025

This version is compatibile with iOS 18.

User reviews

Most RecentHighest RatedLowest Rated

Helped with pre- algebra

This was a great help today with pre-algebra work. I'm going to look into getting the whole MathFlair app. Great resource for jr and sr high math classes.
Stac567Stac567

Full answers without needing to be loaded!

Get this app IF YOUR IN 8th grade! Please!!!
Xboxdictator78Xboxdictator78

What...

This app is for little kids and is completely unhelpful. Stupid.
CPlou42CPlou42

Amazing

It has everything I'm doing in school right now and is simple to use. 👍👍👍👍👍
WillZzZaayWillZzZaay

Love this App, but why IOS6?

I am a high school math teacher, and our school is an "ischool", where the students each get to check out an iPod for educational purposes. I absolutely love this app to help my students learn to simplify square roots. But I've recently discovered that some of them cannot update to IOS6 because some of the devices are a bit too old. I am glad it is updated for the new IOS, but SO bummed that it doesn't work for earlier IOS versions. Can that be fixed?
Show more
SarahNicholsonSarahNicholson
See 7 more reviews

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FAQ

What math concepts does 20/20 Primes and Factor Trees teach?

20/20 Primes and Factor Trees teaches prime factorization, Least Common Multiple (LCM), and Greatest Common Divisor (GCD). It covers methods like factor trees and listing multiples/divisors.

How does 20/20 Primes and Factor Trees help students learn?

The app acts as a tutor by providing coaching calculators and detailed step-by-step guidance. This allows students to develop understanding quickly by seeing each process in detail.

What is the price of 20/20 Primes and Factor Trees?

20/20 Primes and Factor Trees is a paid app, priced at $0.99. This one-time purchase grants access to all its features.

On which devices can I use 20/20 Primes and Factor Trees?

20/20 Primes and Factor Trees is available for iPhone and iPad. It is designed to work on Apple's mobile operating systems.

How often is 20/20 Primes and Factor Trees updated?

The latest version of 20/20 Primes and Factor Trees is 9.1, last updated on September 4, 2025. This indicates active development and support for the application.

What is the age rating for 20/20 Primes and Factor Trees?

20/20 Primes and Factor Trees has an age rating of 4+. This suggests it is suitable for young learners and covers fundamental mathematical concepts.

Does 20/20 Primes and Factor Trees have ads?

No, 20/20 Primes and Factor Trees does not contain advertisements. As a paid application, it offers an uninterrupted learning experience.

What do users like about 20/20 Primes and Factor Trees?

Based on its rating of 5.0 stars from 1 rating, users likely appreciate its effectiveness as a learning aid. The detailed step-by-step guidance and focus on core number theory concepts are probable strengths.