# TriangleS vs Trigonometric Calculation

The clearest difference is price: Trigonometric Calculation at Free against TriangleS's $0.99. Trigonometric Calculation also leads on update cadence (every 6 weeks vs every 4 months). TriangleS's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.5). On in-app purchases and device support there is nothing between them.

Trigonometric Calculation is free to download; TriangleS costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TriangleS ships an update every 4 months, Trigonometric Calculation every 6 weeks. The most recent releases landed on September 8, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | TriangleS | Trigonometric Calculation |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 2 MB | 5 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ryo sasaki](https://appshunter.io/developer/318552526) | [Risako Asai](https://appshunter.io/developer/1671273580) |

## What reviewers say

### TriangleS

[App page](https://appshunter.io/ios/app/triangles/id1572386611)

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

**In-app purchases:** none


### Trigonometric Calculation

[App page](https://appshunter.io/ios/app/trigonometric-calculation/id1636196284)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TriangleS free?

TriangleS costs $0.99, with no in-app purchases.

### Is Trigonometric Calculation free?

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

### Do TriangleS or Trigonometric Calculation have ads?

Trigonometric Calculation shows ads; TriangleS does not.

### Which is updated more often, TriangleS or Trigonometric Calculation?

TriangleS ships an update every 4 months, and Trigonometric Calculation every 6 weeks. Most recently, TriangleS was updated on September 8, 2026 and Trigonometric Calculation on May 16, 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.*