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 see 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 4.0.5

- Fixed floating keyboard bug, present on some devices running iOS 13

Ratings and Reviews

4.7 out of 5
301 Ratings

301 Ratings

Scuttlebutt95 ,

Love it

I’m a Surveyor and should be able to do this in my sleep but with all the new tools I have lost some basic skills. This app is very simple and gets me TGE answer I need in a snap.

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.

T9183756 ,

Just right

Simple, fast and easy to read.


David Caddy
22 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German

Age Rating
In-App Purchases
  1. Trig Help Premium $3.99
  2. Trig Help Premium $1.99
  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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