# WaterMeApp vs Ventilate

The clearest difference is update cadence: Ventilate at every 5 days against WaterMeApp's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. WaterMeApp sells 2 in-app purchases, starting at $4.99 per month and Ventilate sells 2 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

WaterMeApp ships an update every 3 weeks, Ventilate every 5 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | WaterMeApp | Ventilate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ventilate-when-to-open/id6786653699/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 9 MB | 16 MB |
| Requires iOS | **18.5** | 18.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Katsiaryna Buyanava](https://appshunter.io/developer/6779227960) | [Vivace App Studio](https://appshunter.io/developer/1795460622) |

## What reviewers say

### WaterMeApp

[App page](https://appshunter.io/ios/app/watermeapp/id6779227958)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WaterMe Premium Monthly | $4.99 | per month |
| WaterMe Premium Yearly | $39.99 | per year |


### Ventilate

[App page](https://appshunter.io/ios/app/ventilate-when-to-open/id6786653699)

This app provides personalized guidance on when to open or close windows and where to place fans based on local weather and indoor temperature. It helps optimize home cooling by suggesting the use of outdoor air when it's cooler, potentially reducing air conditioning use.

**Highlights:** Per-window advice (close, crack, open wide), Fan placement guidance, Weather-based timing, Outdoor air cooling optimization, Indoor temperature history chart, Gentle reminders, Home Screen widget and Siri integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Ventilate Pro | $0.99 | per 7 days |
| Yearly Ventilate Pro | $9.99 | per year |


## Frequently asked questions

### Is WaterMeApp free?

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

### Is Ventilate free?

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

### Do WaterMeApp or Ventilate have ads?

Neither WaterMeApp nor Ventilate shows ads.

### Which is updated more often, WaterMeApp or Ventilate?

WaterMeApp ships an update every 3 weeks, and Ventilate every 5 days. Most recently, WaterMeApp was updated on October 24, 2026 and Ventilate on October 31, 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.*