# Trigonometry calc vs Trigonometric Time Attack

The clearest difference is in-app purchases: Trigonometric Time Attack at none against Trigonometry calc's 1. On price, update cadence, ads and device support there is nothing between them.

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

Trigonometry calc ships an update every 3 months, Trigonometric Time Attack every 2 months. The most recent releases landed on October 12, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Trigonometry calc | Trigonometric Time Attack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 25 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bo Kalvslund](https://appshunter.io/developer/572272193) | [takamitsu furuya](https://appshunter.io/developer/1599281350) |

## 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 |


### Trigonometric Time Attack

[App page](https://appshunter.io/ios/app/trigonometric-time-attack/id1599281348)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry calc free?

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

### Is Trigonometric Time Attack free?

Trigonometric Time Attack is free to download, with no in-app purchases.

### Do Trigonometry calc or Trigonometric Time Attack have ads?

Both Trigonometry calc and Trigonometric Time Attack show ads.

### Which is updated more often, Trigonometry calc or Trigonometric Time Attack?

Trigonometry calc ships an update every 3 months, and Trigonometric Time Attack every 2 months. Most recently, Trigonometry calc was updated on October 12, 2026 and Trigonometric Time Attack on September 27, 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.*