# ArcAir vs Wind Triangle

The clearest difference is price: ArcAir at Free against Wind Triangle's $2.99. ArcAir also leads on iOS requirement (13.0 vs 17.6). Wind Triangle's advantage is in-app purchases (none vs 2) and update cadence (every 2 months vs every 5 months). On ads and device support there is nothing between them.

ArcAir is free to download; Wind Triangle costs $2.99 up front. ArcAir sells 2 one-off in-app purchases. Wind Triangle asks for nothing beyond the download.

ArcAir ships an update every 5 months, Wind Triangle every 2 months. The most recent releases landed on November 2, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | ArcAir | Wind Triangle |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.0 (8 ratings)](https://appshunter.io/ios/app/arcair/id1133492319/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 21 MB | 1 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Hamilton AG](https://appshunter.io/developer/530886485) | [Small Aviation Tools](https://appshunter.io/developer/1887792413) |

## What reviewers say

### ArcAir

[App page](https://appshunter.io/ios/app/arcair/id1133492319)

This app facilitates the online monitoring and visualization of various sensor data for biotechnological processes. It allows wireless communication with multiple sensors simultaneously and provides central data management, reporting, and validation for sensor calibration and configuration, supporting GMP guidelines.

**Highlights:** Online sensor monitoring, Data visualization, Wireless sensor communication, Central data management, Sensor calibration validation, Paperless workflow support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ArcAir Basic Version | Free | one-time |
| ArcAir Advanced Version | $199.99 | one-time |


### Wind Triangle

[App page](https://appshunter.io/ios/app/wind-triangle/id6761390120)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ArcAir free?

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

### Is Wind Triangle free?

Wind Triangle costs $2.99, with no in-app purchases.

### Do ArcAir or Wind Triangle have ads?

Neither ArcAir nor Wind Triangle shows ads.

### Which is updated more often, ArcAir or Wind Triangle?

ArcAir ships an update every 5 months, and Wind Triangle every 2 months. Most recently, ArcAir was updated on November 2, 2026 and Wind Triangle on November 9, 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.*