# Trigonometric Calculation vs CrewBoard

The clearest difference is update cadence: CrewBoard at every 10 days against Trigonometric Calculation's every 6 weeks. Trigonometric Calculation's advantage is iOS requirement (15.5 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Trigonometric Calculation ships an update every 6 weeks, CrewBoard every 10 days. The most recent releases landed on September 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Trigonometric Calculation | CrewBoard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Size | 5 MB | 12 MB |
| Requires iOS | **15.5** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Risako Asai](https://appshunter.io/developer/1671273580) | [Ryuichi Shirakawa](https://appshunter.io/developer/1895901690) |

## What reviewers say

### Trigonometric Calculation

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

**Features:** macOS Compatibility

**In-app purchases:** none


### CrewBoard

[App page](https://appshunter.io/ios/app/crewboard/id6765751437)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometric Calculation free?

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

### Is CrewBoard free?

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

### Do Trigonometric Calculation or CrewBoard have ads?

Both Trigonometric Calculation and CrewBoard show ads.

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

Trigonometric Calculation ships an update every 6 weeks, and CrewBoard every 10 days. Most recently, Trigonometric Calculation was updated on September 27, 2026 and CrewBoard on October 7, 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.*