# CleanAirOptima vs Zo Gemeld

The clearest difference is rating: Zo Gemeld at 4.7 against CleanAirOptima's 1.0. Zo Gemeld also leads on update cadence (every 2 weeks vs every 17 months) and ratings volume (3 vs 1). CleanAirOptima's advantage is iOS requirement (12.0 vs 15.0). 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.

Zo Gemeld holds the better App Store score, 4.7 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

CleanAirOptima ships an update every 17 months, Zo Gemeld every 2 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | CleanAirOptima | Zo Gemeld |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/cleanairoptima/id1597731227/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/zo-gemeld/id6463782066/reviews)** |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 194 MB | 82 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Clean Air Optima International B.V.](https://appshunter.io/developer/1597731229) | [Delta10 BV](https://appshunter.io/developer/1704981661) |

## What reviewers say

### CleanAirOptima

[App page](https://appshunter.io/ios/app/cleanairoptima/id1597731227)

Control and monitor your smart air quality devices remotely from anywhere in the world. Set desired temperature and humidity levels, and track air quality across different rooms in your home.

**Highlights:** Remote device control, Real-time monitoring, Temperature and humidity tracking, Room management, Global access with internet

**Features:** macOS Compatibility

**In-app purchases:** none


### Zo Gemeld

[App page](https://appshunter.io/ios/app/zo-gemeld/id6463782066)

Easily report issues like fallen trees or abandoned bikes to your municipality. The app allows you to describe the problem, add photos, and specify the location. You can also track the status of your reports and opt-in for updates.

**Highlights:** Describe reports easily, Add pictures to reports, Specify report location, Track report status, Receive report updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CleanAirOptima free?

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

### Is Zo Gemeld free?

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

### Which has better reviews, CleanAirOptima or Zo Gemeld?

Zo Gemeld is rated higher. CleanAirOptima averages 1.0 out of 5 from 1 ratings, while Zo Gemeld averages 4.7 from 3 ratings.

### Do CleanAirOptima or Zo Gemeld have ads?

Neither CleanAirOptima nor Zo Gemeld shows ads.

### Which is updated more often, CleanAirOptima or Zo Gemeld?

CleanAirOptima ships an update every 17 months, and Zo Gemeld every 2 weeks. Most recently, CleanAirOptima was updated on November 3, 2026 and Zo Gemeld on November 7, 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.*