# Trigonometry calc — Calculations on right triangle

> Right-angled triangle calculator using trigonometry and Pythagorean theorem. (iPhone/iPad app by Bo Kalvslund.)

- Source: https://appshunter.io/ios/app/trigonometry-calc/id1306864057 (this page in markdown: same URL + `.md`)
- Developer: [Bo Kalvslund](https://appshunter.io/developer/572272193)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Rating: 3.00/5 from 2 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 10 MB
- Languages: American English
- Released: 2017-11-04
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews.md

## What is Trigonometry calc?

Use Trigonometry Calc to calculate sidelengths and angles in the right angled triangle.

By the help of Pythagorean Theorem and some trigonometry functions you can in this app calculate side lengths and angles in any right angled triangle.

Learn simple trigonometry.

•Math
•Trigonometry
•Pythagorean Theorem

Trigonometry Premium                               
Go ad-free forever and unlock the advanced General Triangle Calculator (SAS/SSA/ASA).
Solve any triangle, not just right triangles

## Key features

- Calculate side lengths
- Calculate angles
- Pythagorean Theorem
- Trigonometry functions
- Learn simple trigonometry
- General triangle calculator (premium)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium | $0.99 | one-time |


## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews.md

### 2/5 — Not quite there

*2022-05-30*

This is a nice and simple app to use but the font sizes are far too small to see the results clearly. This makes the app almost useless!

### 1/5 — N

*2020-09-28*

Deleted within 5 seconds after the first add popped up

**Developer response:** Sorry to hear that. I have changed the setup so it should be more user friendly. Regards Bo

### 1/5 — Ilegible results.

*2020-03-13*

Can’t read answers with white type on yellow background.

**Developer response:** I’ll change the app to support Dark mode- Thanks!
Regards Bo

Update: now I have changed the layout. The text is readable now.
/Bo

### 1/5 — Trig is not the problem

*2019-07-06*

SSS
AAA
How about SAS
Just want a quick visual for the field. I give you a a length and an angle and you give me the hypotenuse. Well, this program doesn't do that.

### 2/5 — Not helpful enough

*2019-05-15*

I'm a high schooler who was just trying to get some work done on my assignments but I forgot my good calculator at home. This calculator doesn't help if you need angles and sides in the same calculation. It has 3 uses, shows the Pythagorean Theorem, calculates one angle given the other angle, and calculates on side given two other sides. It also uses decimals instead of fractions.

## Frequently asked questions about Trigonometry calc

### What can Trigonometry calc calculate?

Trigonometry calc can calculate side lengths and angles in right-angled triangles using the Pythagorean theorem and various trigonometry functions. The premium version extends this to solve any triangle.

### Is Trigonometry calc free to use?

Yes, Trigonometry calc is free to download and use. It does contain advertisements, and an in-app purchase is available to remove ads and unlock advanced features.

### Does Trigonometry calc have ads?

Yes, Trigonometry calc contains advertisements. Users can opt to purchase Trigonometry Premium to go ad-free permanently.

### What devices is Trigonometry calc available on?

Trigonometry calc is available on iPhone, iPad, and iPod devices.

### How often is Trigonometry calc updated?

The latest version of Trigonometry calc is 2.4, last updated on January 23, 2026. This indicates regular updates to improve functionality and features.

### What is the user rating for Trigonometry calc?

Trigonometry calc has a rating of 3.0 stars based on 2 ratings. This suggests a mixed but generally positive reception from its user base.

### What age rating is Trigonometry calc?

Trigonometry calc has an age rating of 4+, making it suitable for a wide range of users, including younger learners.

### Can Trigonometry calc solve general triangles, not just right triangles?

The free version of Trigonometry calc is designed for right-angled triangles. The advanced General Triangle Calculator, which solves any triangle (SAS/SSA/ASA), is unlocked via an in-app purchase.

## Version history (last 5 releases)

### 2.4 — 2026-01-23

• Trigonometry Premium – Remove all ads forever with a  
  single purchase                                         
                                                          
  • General Triangle Calculator – Solve any triangle with 
  SAS, SSA, and ASA methods (Premium feature)             
                                                          
  • Full English language support                         
                                                          
  • Performance improvements and bug fixes

### 2.3 — 2025-02-13

Updated for new operating system.
Dependencies updated.

### 2.2 — 2025-01-22

Updated for new operating system

### 2.1 — 2024-02-28

Updated for new screen sizes.

### 2.0 — 2020-10-25

New animation with proof of Pythagoras' Theorem.

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## More apps by Bo Kalvslund

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- [Party on Mallorca](https://appshunter.io/ios/app/party-on-mallorca/id881799200)
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All apps by Bo Kalvslund: https://appshunter.io/developer/572272193

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*