Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Terrific Triangle Screenshots

iPad

iPhone

About Terrific Triangle

A math facts drill-and-practice program that teaches fact families for both addition/subtraction and multiplication/division. Terrific Triangle allows individual facts practice with a running score for correct answers. The player may select a difficulty level and whether to play against a timer. The triangle presents two parts of a fact family and the player must determine the missing third part. The sum and product always appear at the top of the triangle. The addends and factors always go in the two lower corners. This app contains no ads or links to social media. Just FREE.

What's New in the Latest Version 1.4

Last updated on Feb 9, 2024

Old Versions

Improved support for Dynamic Island and the iPhone 15 series. The preferences now provide a more granular control over the difficulty level of problems being presented... and an explanation of which fact families are included with each difficulty level.

Version History

1.4

Feb 9, 2024

1.3.5

Nov 26, 2023

Support for iOS 17

1.3.4

Feb 25, 2022

Minor cosmetic and performance improvements.

1.3.3

Feb 20, 2022

Terrific Triangles is a bit more nimble. But that's not all. We added a couple animations to make getting a correct answer just a little bit more fun. We reduced the system requirements so that it works on iOS 10 again... in case you are using older devices. (iPhone 5 is good to go!) And we made a few minor cosmetic improvements and bug fixes.

1.3.1

Jul 21, 2020

Now faster, easier to use and with better feedback for correct answers.

1.2

Sep 19, 2018

Improved compatibility with iOS 12

1.1

Apr 19, 2018

Better visual feedback for correct answers.

1.0

Apr 9, 2018

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