# CleanAirOptima vs NL

The clearest difference is ads: CleanAirOptima at none against NL's shown. CleanAirOptima also leads on iOS requirement (12.0 vs 17.6). NL's advantage is update cadence (every 5 months vs every 17 months). On price, in-app purchases and device support there is nothing between them.

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

CleanAirOptima ships an update every 17 months, NL every 5 months. The most recent releases landed on July 17, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | CleanAirOptima | NL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Every 5 months** |
| Size | 194 MB | 74 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Clean Air Optima International B.V.](https://appshunter.io/developer/1597731229) | [Politie](https://appshunter.io/developer/1812846463) |

## What reviewers say

### CleanAirOptima

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

**Features:** macOS Compatibility

**In-app purchases:** none


### NL

[App page](https://appshunter.io/ios/app/nl-alert/id6443585319)

**In-app purchases:** none


## Frequently asked questions

### Is CleanAirOptima free?

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

### Is NL free?

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

### Do CleanAirOptima or NL have ads?

NL shows ads; CleanAirOptima does not.

### Which is updated more often, CleanAirOptima or NL?

CleanAirOptima ships an update every 17 months, and NL every 5 months. Most recently, CleanAirOptima was updated on July 17, 2026 and NL on September 9, 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.*