# Triangle Solver vs Trigonometry calc

The clearest difference is review sentiment: Triangle Solver at 75% against Trigonometry calc's 0%. Triangle Solver also leads on rating (4.2 vs 3.0) and in-app purchases (none vs 1). Trigonometry calc's advantage is update cadence (every 3 months vs every 21 months). On price and device support there is nothing between them.

Both are free to download. Trigonometry calc sells 1 one-off in-app purchase. Triangle Solver asks for nothing beyond the download.

Triangle Solver holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: Triangle Solver has 31 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 75% of Triangle Solver's written reviews are positive against 0% of Trigonometry calc's.

Triangle Solver ships an update every 21 months, Trigonometry calc every 3 months. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Triangle Solver | Trigonometry calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (31 ratings)](https://appshunter.io/ios/app/triangle-solver/id383052814/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews) |
| Number of ratings | **31** | 2 |
| Positive reviews | **75.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 97 MB | 10 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [William Jockusch](https://appshunter.io/developer/342126227) | [Bo Kalvslund](https://appshunter.io/developer/572272193) |

## What reviewers say

### Triangle Solver

[App page](https://appshunter.io/ios/app/triangle-solver/id383052814)

Calculate unknown sides and angles of a triangle with ease. Supports various input combinations, including two angles and one side, two sides and one angle, or three sides.

**Highlights:** Calculate unknown sides, Calculate unknown angles, Two angles and one side input, Two sides and one angle input, Three sides input

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

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 📐 Accurate calculations
- ✨ Ad-free experience
- 📐 Dynamic triangle diagram
- 🚀 Quick results

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Stopped working on iOS
- 🐛 Input fields not clear
- 🐛 Ads can be intrusive
- 🐛 Difficult to use with irrational numbers

**Reported bugs**

- Stopped working on iPhone and iPad
- App crashes
- Won't open on older devices
- Doesn't allow value entry
- Input fields not clear

**Requested features**

- Add switch to radians feature
- Allow input of irrational numbers
- Show steps for solving problems
- Triangle shape changes to match values for accurate scale
- Option to use app sideways for larger keyboard


### 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 Triangle Solver free?

Triangle Solver is free to download, with no in-app purchases.

### Is Trigonometry calc free?

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

### Which has better reviews, Triangle Solver or Trigonometry calc?

Triangle Solver is rated higher. Triangle Solver averages 4.2 out of 5 from 31 ratings, while Trigonometry calc averages 3.0 from 2 ratings.

### Do Triangle Solver or Trigonometry calc have ads?

Trigonometry calc shows ads; Triangle Solver does not.

### Which is updated more often, Triangle Solver or Trigonometry calc?

Triangle Solver ships an update every 21 months, and Trigonometry calc every 3 months. Most recently, Triangle Solver was updated on October 3, 2026 and Trigonometry calc on October 12, 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.*