# CO₂ AR vs Wald.Berlin.Klima.

The clearest difference is update cadence: CO₂ AR at daily against Wald.Berlin.Klima.'s every 7 months. CO₂ AR also leads on iOS requirement (11.0 vs 13.2). On price, ads, 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.

CO₂ AR ships an update daily, Wald.Berlin.Klima. every 7 months. The most recent releases landed on September 30, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | CO₂ AR | Wald.Berlin.Klima. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 7 months |
| Size | 95 MB | 380 MB |
| Requires iOS | **11.0** | 13.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ekkehard Petzold](https://appshunter.io/developer/1156102927) | [Land Berlin](https://appshunter.io/developer/971230603) |

## What reviewers say

### CO₂ AR

[App page](https://appshunter.io/ios/app/co-ar/id1296287523)

**Features:** macOS Compatibility

**In-app purchases:** none


### Wald.Berlin.Klima.

[App page](https://appshunter.io/ios/app/waldberlinklima/id1528363365)

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

**In-app purchases:** none


## Frequently asked questions

### Is CO₂ AR free?

CO₂ AR is free to download, with no in-app purchases.

### Is Wald.Berlin.Klima. free?

Wald.Berlin.Klima. is free to download, with no in-app purchases.

### Do CO₂ AR or Wald.Berlin.Klima. have ads?

Neither CO₂ AR nor Wald.Berlin.Klima. shows ads.

### Which is updated more often, CO₂ AR or Wald.Berlin.Klima.?

CO₂ AR ships an update daily, and Wald.Berlin.Klima. every 7 months. Most recently, CO₂ AR was updated on September 30, 2026 and Wald.Berlin.Klima. 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.*