# Trigonometry! vs Trigonometry calc

The clearest difference is rating: Trigonometry calc at 3.0 against Trigonometry!'s 2.0. Trigonometry!'s advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. Trigonometry! sells 1 one-off in-app purchase and Trigonometry calc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Trigonometry calc holds the better App Store score, 3.0 against 2.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews complicate that: 14% of Trigonometry!'s written reviews are positive against 0% of Trigonometry calc's, so the app with the better star average is not the one people write more warmly about.

Trigonometry! ships an update every 4 months, Trigonometry calc every 3 months. The most recent releases landed on September 18, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Trigonometry! | Trigonometry calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/trigonometry/id1236663817/reviews) | **[3.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | **14.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 29 MB | 10 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AppCrab](https://appshunter.io/developer/1227198215) | [Bo Kalvslund](https://appshunter.io/developer/572272193) |

## What reviewers say

### Trigonometry!

[App page](https://appshunter.io/ios/app/trigonometry/id1236663817)

Master trigonometry with this comprehensive mobile helper. It offers a textbook, visual explanations, and video lessons covering all essential formulas and theorems. Prepare for your exams with detailed content and easy-to-understand explanations.

**Highlights:** Ordered set of basic formulas and theorems, 172 video lessons, Easy-to-read and understand textbook, Covers major trigonometry topics, Visual explanations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trigonometry Premium | $0.99 | one-time |


### Trigonometry calc

[App page](https://appshunter.io/ios/app/trigonometry-calc/id1306864057)

Calculate side lengths and angles in right-angled triangles using Pythagorean theorem and trigonometry functions. Learn basic trigonometry concepts. An optional premium version removes ads and unlocks a general triangle calculator.

**Highlights:** Calculate side lengths, Calculate angles, Pythagorean Theorem, Trigonometry functions, Learn simple trigonometry, General triangle calculator (premium)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

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


## Frequently asked questions

### Is Trigonometry! free?

Trigonometry! is free to download, with in-app purchases available.

### Is Trigonometry calc free?

Trigonometry calc is free to download, with in-app purchases available.

### Which has better reviews, Trigonometry! or Trigonometry calc?

Trigonometry calc is rated higher. Trigonometry! averages 2.0 out of 5 from 4 ratings, while Trigonometry calc averages 3.0 from 2 ratings.

### Do Trigonometry! or Trigonometry calc have ads?

Trigonometry calc shows ads; Trigonometry! does not.

### Which is updated more often, Trigonometry! or Trigonometry calc?

Trigonometry! ships an update every 4 months, and Trigonometry calc every 3 months. Most recently, Trigonometry! was updated on September 18, 2026 and Trigonometry calc on September 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*