# Trigonometry calc vs Tri

The clearest difference is review sentiment: Tri at 67% against Trigonometry calc's 0%. Tri also leads on rating (4.5 vs 3.0) and ratings volume (17 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Tri holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Tri has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Trigonometry calc's written reviews are positive against 67% of Tri's.

Trigonometry calc ships an update every 3 months, Tri every 2 months. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Trigonometry calc | Tri |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews) | **[4.5 (17 ratings)](https://appshunter.io/ios/app/tri-go-math-your-math-helper/id1525513476/reviews)** |
| Number of ratings | 2 | **17** |
| Positive reviews | 0.0% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 48 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bo Kalvslund](https://appshunter.io/developer/572272193) | [Alejandro Apodaca](https://appshunter.io/developer/1524127326) |

## What reviewers say

### 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 |


### Tri

[App page](https://appshunter.io/ios/app/tri-go-math-your-math-helper/id1525513476)

This app simplifies math homework with a suite of tools including area, basic, and trigonometry calculators. It offers offline access and equation solvers for first and second-degree equations, with more features planned.

**Highlights:** Offline Access, Area Calculator, Basic Calculator, Trigonometry Calculator, Unit Converter, Equation Solvers

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quitar anuncios | $1.99 | one-time |


## Frequently asked questions

### Is Trigonometry calc free?

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

### Is Tri free?

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

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

Tri is rated higher. Trigonometry calc averages 3.0 out of 5 from 2 ratings, while Tri averages 4.5 from 17 ratings.

### Do Trigonometry calc or Tri have ads?

Both Trigonometry calc and Tri show ads.

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

Trigonometry calc ships an update every 3 months, and Tri every 2 months. Most recently, Trigonometry calc was updated on October 18, 2026 and Tri on October 5, 2026.

---

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