ArcAir vs Windmill Air
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ArcAir
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.
- Online sensor monitoring
- Data visualization
- Wireless sensor communication
- Central data management
- Sensor calibration validation
- Paperless workflow support
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ArcAir is the app for Hamilton Arc sensors. It enables online monitoring and visualization of pH, dissolved oxygen, CO2, cell density, conductivity, and ORP sensors during biotechnological processes. With the ArcAir application, you can communicate wirelessly with up to 100 Arc sensors at the same time parallel to the process control system interface when an Arc Wi Bluetooth adapter is connected between the VP head of an Arc sensor and the VP sensor cable or the sensor has inbuilt Bluetooth functionality. Within the ArcAir application, Hamilton provides reporting and central data management of users, as well as validation reports for sensor calibration (excluding VCD sensors), verification, configuration, and communication. ArcAir embeds report’s electronic signatures, enabling paperless workflow. All of this complies with the GMP guidelines such as FDA CFR21 Part 11 or Eudralex Volume 4 Annex 11.
Windmill Air
This app allows you to remotely control your smart air care devices. Set schedules and adjust settings to create your ideal home climate from anywhere.
- Remote product control
- Set automation schedules
- Adjust any setting
- Create ideal home climate
- Eco-friendly product integration
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Windmill's air care products are modern, smart, and eco-friendly. Use the Windmill Air app to: 1. Control your products from anywhere! For example, turn on your Windmill AC before you get home, or shut it off in case you forget. 2. Set automation schedules to perfectly match your lifestyle. 3. Adjust any setting with ease, helping you create the ideal home climate!
Screenshots
Verdict
The clearest difference is review sentiment: ArcAir at 100% against Windmill Air's 28%. ArcAir also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.4). Windmill Air's advantage is rating (4.7 vs 4.0) and in-app purchases (none vs 2). On price and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ArcAir sells 2 one-off in-app purchases. Windmill Air asks for nothing beyond the download.
Windmill Air holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Windmill Air has 6.2K ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 100% of ArcAir's written reviews are positive against 28% of Windmill Air's, so the app with the better star average is not the one people write more warmly about.
ArcAir ships an update every 5 months, Windmill Air every 2 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.
| Parameter | ArcAir | Windmill Air |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (8 ratings) | 4.7 (6.2K ratings) — better |
| Positive reviews | 100.0% of reviews — better | 27.9% of reviews |
| Number of ratings | 8 | 6.2K — better |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 21 MB | 83 MB |
| Age rating | 4+ | 4+ |
| Developer | Hamilton AG | The Air Lab, Inc. |
Customer experience
ArcAir
Windmill Air
Bugs and requests
ArcAir
Not enough reviews yet to summarise bugs or requests.
Windmill Air
Reported bugs
4 issues- App unable to maintain accurate room temperature readings
- Automations not working as expected or reverting settings
- Connectivity issues causing the app to lose control of the unit
- Inconsistent behavior when turning the unit on/off or changing settings
Requested features
4 requests- Integration with smart home platforms
- Improved automation and scheduling capabilities
- More granular temperature and fan speed controls
- Ability to disable annoying app notifications
In-app purchases
ArcAir
- ArcAir Basic VersionFree
- ArcAir Advanced Version$199.99
Windmill Air
No in-app purchases
