# Arcsin Calculator vs ARCmaster

The clearest difference is update cadence: ARCmaster at every 3 weeks against Arcsin Calculator's every 12 months. Arcsin Calculator's advantage is iOS requirement (13.0 vs 15.0). 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.

Arcsin Calculator ships an update every 12 months, ARCmaster every 3 weeks. The most recent releases landed on September 10, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Arcsin Calculator | ARCmaster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 weeks** |
| Size | 43 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [STAGE CODING, Travnik](https://appshunter.io/developer/1637068135) | [Anh Thu Duong](https://appshunter.io/developer/1887275689) |

## What reviewers say

### Arcsin Calculator

[App page](https://appshunter.io/ios/app/arcsin-calculator/id1618615902)

**Features:** macOS Compatibility

**In-app purchases:** none


### ARCmaster

[App page](https://appshunter.io/ios/app/arcmaster-geometry-calculator/id6761011090)

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

**In-app purchases:** none


## Frequently asked questions

### Is Arcsin Calculator free?

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

### Is ARCmaster free?

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

### Do Arcsin Calculator or ARCmaster have ads?

Neither Arcsin Calculator nor ARCmaster shows ads.

### Which is updated more often, Arcsin Calculator or ARCmaster?

Arcsin Calculator ships an update every 12 months, and ARCmaster every 3 weeks. Most recently, Arcsin Calculator was updated on September 10, 2026 and ARCmaster on September 24, 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.*