Trig Help is a simple triangle calculator that enables you to quickly and easily find unknown angles & sides of any right-angled triangle.

Features Include:

- Accurately solve right-angled triangles
- Workings view, so you can the math behind the solutions (requires optional upgrade)
- View a scale drawing of your solved triangle
- View a handy set of basic trig formulae
- Enter angles in radians, decimal degrees or degrees, minutes, seconds
- Select your preferred number of decimal places

What two App Store reviewers had to say about Trig Help:

"I could never remember those simple formulas. I always had to dig out my text books from MANY YEARS ago to refresh my memory. THIS LITTLE APP IS A DELIGHT TO USE! I love it! Even my engineer friends are impressed. THANKS!" 5 Stars

"Easy to use and accurate with high degree of precision. Would recommend to any toolmaker." 5 Stars

Also available for OS X on the Mac App Store.

What’s New

Version 4.0.1

- Bug fixes

Ratings and Reviews

4.6 out of 5
197 Ratings

197 Ratings

Plumnelly ,

Trig Help

Couldn't ask for an easier to do math. When in school we had to show our work with no calculator. Love this app.

andsal ,

I can’t believe I bought this based on reviews.

These reviews are obviously fake. There is no way to calculate for cofunctions, tangents, you name it. It can only do basic calculations related to the Pythagorean theorem. This is definitely not a trigonometry app in the least. It’s worthless. I can’t believe I just paid for this garbage.

T9183756 ,

Just right

Simple, fast and easy to read.


David Caddy
21.3 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German

Age Rating
Rated 4+
© 2011-2019 David Caddy
In-App Purchases
  1. Trig Help Premium $0.99
  2. Trig Help Premium $2.99
  3. Trig Help Premium $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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