# OpenAir vs Coolhouse

The clearest difference is in-app purchases: Coolhouse at none against OpenAir's 3. Coolhouse also leads on iOS requirement (15.1 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OpenAir sells 3 one-off in-app purchases. Coolhouse asks for nothing beyond the download.

OpenAir ships an update every 4 days, Coolhouse weekly. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | OpenAir | Coolhouse |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/openair-window-weather/id6777466080/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | Free | — |
| Size | 3 MB | 43 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Smart Post App, LLC](https://appshunter.io/developer/591683240) | [Arnaud Allouis](https://appshunter.io/developer/6782636323) |

## What reviewers say

### OpenAir

[App page](https://appshunter.io/ios/app/openair-window-weather/id6777466080)

This app helps you decide the optimal time to open your windows for fresh air. It compares indoor comfort with outdoor weather conditions like temperature, dew point, humidity, rain, and wind to provide simple recommendations.

**Highlights:** Window opening recommendations, Indoor vs. outdoor condition comparison, Humidity and dew point monitoring, Rain and wind alerts, Simple open/close guidance, Fresh air optimization

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |


### Coolhouse

[App page](https://appshunter.io/ios/app/coolhouse/id6782636321)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenAir free?

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

### Is Coolhouse free?

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

### Do OpenAir or Coolhouse have ads?

Neither OpenAir nor Coolhouse shows ads.

### Which is updated more often, OpenAir or Coolhouse?

OpenAir ships an update every 4 days, and Coolhouse weekly. Most recently, OpenAir was updated on October 16, 2026 and Coolhouse on October 12, 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.*