# CO₂ AR vs Climate Clock

The clearest difference is update cadence: CO₂ AR at daily against Climate Clock's every 2 days. CO₂ AR also leads on iOS requirement (11.0 vs 17.0). 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, Climate Clock every 2 days. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | CO₂ AR | Climate Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 days |
| Size | 95 MB | 11 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Ekkehard Petzold](https://appshunter.io/developer/1156102927) | [Woven GbR Dahlmann, Linz, Waetke, Wolf](https://appshunter.io/developer/1744825040) |

## What reviewers say

### CO₂ AR

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Climate Clock

[App page](https://appshunter.io/ios/app/climate-clock/id6502842493)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CO₂ AR free?

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

### Is Climate Clock free?

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

### Do CO₂ AR or Climate Clock have ads?

Neither CO₂ AR nor Climate Clock shows ads.

### Which is updated more often, CO₂ AR or Climate Clock?

CO₂ AR ships an update daily, and Climate Clock every 2 days. Most recently, CO₂ AR was updated on September 30, 2026 and Climate Clock on October 2, 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.*