# Windmill Air vs Sereniby

The clearest difference is rating: Windmill Air at 4.7 against Sereniby's 3.8. Windmill Air also leads on ratings volume (6.2K vs 5). Sereniby's advantage is review sentiment (50% vs 28%) and update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Windmill Air holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Windmill Air has 6.2K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 28% of Windmill Air's written reviews are positive against 50% of Sereniby's, so the app with the better star average is not the one people write more warmly about.

Windmill Air ships an update every 2 months, Sereniby every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Windmill Air | Sereniby |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (6.2K ratings)](https://appshunter.io/ios/app/windmill-air/id1589463108/reviews)** | [3.8 (5 ratings)](https://appshunter.io/ios/app/sereniby/id6569216382/reviews) |
| Number of ratings | **6.2K** | 5 |
| Positive reviews | 27.9% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 83 MB | 116 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Air Lab, Inc.](https://appshunter.io/developer/1521133311) | [Sereniby, Inc.](https://appshunter.io/developer/1758798147) |

## What reviewers say

### Windmill Air

[App page](https://appshunter.io/ios/app/windmill-air/id1589463108)

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.

**Highlights:** Remote product control, Set automation schedules, Adjust any setting, Create ideal home climate, Eco-friendly product integration

**In-app purchases:** none

**What reviewers like**

- 🚀 Aesthetically pleasing design
- 🚀 Quiet operation
- 🚀 Easy installation
- 👍 Responsive app
- 👍 Useful remote control features

**What reviewers complain about**

- 🐛 Inaccurate temperature readings
- 🐛 Unreliable app connectivity and functionality
- 🐛 Automation issues and failures
- 🐛 Inconsistent settings and mode changes
- 🐛 Glitchy app with frequent bugs

**Reported bugs**

- 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**

- Integration with smart home platforms
- Improved automation and scheduling capabilities
- More granular temperature and fan speed controls
- Ability to disable annoying app notifications


### Sereniby

[App page](https://appshunter.io/ios/app/sereniby/id6569216382)

Control your smart air purifier remotely, monitor your baby's room environment in real-time, and receive maintenance alerts. Optimize air quality and comfort with customizable schedules and automatic adjustments for a safe and healthy space.

**Highlights:** Remote smart purifier control, Real-time air quality monitoring, Customizable schedules, Automatic purification adjustments, Maintenance reminders and filter ordering

**In-app purchases:** none


## Frequently asked questions

### Is Windmill Air free?

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

### Is Sereniby free?

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

### Which has better reviews, Windmill Air or Sereniby?

Windmill Air is rated higher. Windmill Air averages 4.7 out of 5 from 6.2K ratings, while Sereniby averages 3.8 from 5 ratings.

### Do Windmill Air or Sereniby have ads?

Neither Windmill Air nor Sereniby shows ads.

### Which is updated more often, Windmill Air or Sereniby?

Windmill Air ships an update every 2 months, and Sereniby every 3 weeks. Most recently, Windmill Air was updated on November 3, 2026 and Sereniby on October 30, 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.*