# TrigCalc - Trig Calculator — Triangle Calculator

> Trigonometry and geometry calculator with step-by-step solutions. (iPhone/iPad app by Matteo Magnan.)

- Source: https://appshunter.io/ios/app/trigcalc-trig-calculator/id1483604801 (this page in markdown: same URL + `.md`)
- Developer: [Matteo Magnan](https://appshunter.io/developer/1483604800)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Rating: 4.11/5 from 47 App Store ratings · 24 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 39 MB
- Languages: English
- Released: 2019-10-26
- Data updated: 2026-06-10
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/trigcalc-trig-calculator/id1483604801/reviews.md

## What is TrigCalc?

Trigcalc aims to make trigonometry calculations as simple yet detailed as possible. Trigcalc provides step-by-step solutions to some of the most common trigonometry and geometry problems. Trigcalc also uses real math notation such as radicals, exponents, fractions, pi, and more. The list of supported calculators are shown below:

- Right Triangles
- Oblique Triangles (non-right triangles)
- Circles
- Sectors
- Trigonometric Identities
- Coterminal Angles
- Supplementary Angles
- Complementary Angles
- Trigonometric Functions
(and growing)

For right triangle calculations, only two values are required so long as one of them is a side length. About two seconds after submitting a calculation a solution is returned which includes the exact values of all sides, angles, the area, the perimeter, and step-by-step explanations for each value. This same calculation and solution process is used for all Trigcalc calculations.

Trigcalc does contain ads but only shows them after a sum of calculations.
These ads can be removed for a one time fee of $5.99.

## Key features

- Step-by-step trigonometry solutions
- Calculations for right and oblique triangles
- Circle and sector calculations
- Trigonometric identities and angle calculations
- Real math notation support
- Exact values for sides, angles, area, and perimeter

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Ad Removal | $5.99 | one-time |


## Recent user reviews (10 of 24)

All indexed reviews: https://appshunter.io/ios/app/trigcalc-trig-calculator/id1483604801/reviews.md

### 1/5 — never even worked

*2024-02-26*

Does Not load. i never wrote app reviews but this one was so bad oml. i do my own work using Calculator84 (app for a scientific calculator, best one i’ve ever used) and i do my own problem and put it into this checker before i started so i could see if i got it right. i am by no mean fast at math. and still, when i went to look if i got the right answer, IT STILL HADNT LOAD. awful. i was on wi-fi! 5bars.

### 2/5 — Doesn’t work offline, clunky UI and no privacy information

*2022-05-24, version 1.8.0*

Even though the app is performing mathematical calculations any Apple device can easily solve using its own internal processing power, the app requires an internet connection to function at all. Similar apps do not have such a requirement.

The UI will randomly zoom in when you tap to enter a value, which can cut off part of the number pad. The number pad itself is oddly laid out, with 0-9 running left to right in two rows, rather than 9-1 running right to left in 3 rows with 0 and the decimal on a fourth row like a standard number pad on a calculator. The decimal seems almost hidden in the middle of a row of math symbols. The multiplication symbol is a dot rather than an X which is easily confused with the decimal. Results are sometimes given as equations rather than numbers seemingly at random. While you can then tap to view the results as numbers this brings up a chart which hides the graphic representation of the triangle. 

Lastly, the app has not been updated since Apple began requiring developers to disclose what data they collect about you through the app, so users have no information about what data the developer is collecting through the app. That should be concerning to anyone who values their privacy.

### 1/5 — Doesn’t work.

*2021-10-25, version 1.8.0*

I get infinite loading whenever I ask it to calculate.

**Developer response:** Sorry for your experience however, TrigCalc does not work offline.

### 5/5 — Saved my math grade!!!

*2021-01-21, version 1.8.0*

Download for trigonometry!! nearly saved my trigonometry grade!!! thank you!!!!!!

### 5/5 — Amazing!

*2021-01-17, version 1.8.0*

I don’t usually write reviews, but this app is amazing for a trigonometry level of math. It takes time to get used to it, but it definitely does the job that both photomath and mathaway can’t do! So great.

**Developer response:** Thank you!

### 5/5 — college trig

*2020-08-11, version 1.8.0*

Amazing for checking my answers for trig homework. 10/10 would recommend 🤩🤩

**Developer response:** Thanks for your review!

### 5/5 — Amazing

*2020-05-08, version 1.8.0*

This app saved my Semester grade for Algebra 2

### 5/5 — 10/10 would recommend

*2020-04-23, version 1.8.0*

I literally cannot express how much I love this app, I’ve never written a review ever about any app ever and this one literally is so helpful that I just had to. Amazing app, thank you to the creators of it.

**Developer response:** Very glad to know TrigCalc has helped you this much! Thanks for the nice review!

### 5/5 — ABSOLUTELY AMAZING

*2020-04-13, version 1.8.0*

This app is a lifesaver! I don’t usually write reviews but this app literally helped me out so much. I could easily check my answers through the app and it never fails me. Thank you

**Developer response:** Thanks a lot for taking the time to write such a kind review! Glad to know Trigcalc has helped!

### 5/5 — Life saver!

*2020-03-20, version 1.7.0*

Can’t give this app anything lower then 5 stars

**Developer response:** Thanks for your review!

## Frequently asked questions about TrigCalc

### What kind of calculations does this app perform?

This app specializes in trigonometry and geometry calculations. It supports solving for right and oblique triangles, circles, sectors, trigonometric identities, coterminal angles, supplementary angles, complementary angles, and trigonometric functions. It provides detailed, step-by-step solutions for each calculation.

### How are the calculation results displayed?

Results are displayed using real mathematical notation, including radicals, exponents, fractions, and pi. For triangle calculations, you'll receive exact values for all sides, angles, the area, and the perimeter, along with a clear explanation of how each value was derived.

### Is this app free to use?

The app is free to download and use, but it does contain advertisements. These ads are shown infrequently, only after a sum of calculations has been completed. There is an option to remove ads permanently for a one-time fee.

### What is the cost to remove ads?

Ads can be removed from the application for a one-time fee of $5.99. This purchase will provide an ad-free experience for all future uses of the app.

### What information is needed to calculate a right triangle?

To calculate a right triangle, you only need to provide two values, as long as one of them is a side length. The app will then compute all remaining sides, angles, area, and perimeter.

## Version history (last 1 release)

### 1.8.0 — 2020-04-03

bug fixes

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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 2026-06-10.*