# CO2IN vs Planet 2023

The clearest difference is update cadence: Planet 2023 at every 2 days against CO2IN's every 2 months. Planet 2023 also leads on iOS requirement (11.0 vs 15.0). 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.

CO2IN ships an update every 2 months, Planet 2023 every 2 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | CO2IN | Planet 2023 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 74 MB | 124 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [The CO2IN, a.s.](https://appshunter.io/developer/1580951797) | [Trendency KFT](https://appshunter.io/developer/489242967) |

## What reviewers say

### CO2IN

[App page](https://appshunter.io/ios/app/co2in/id1513533437)

**Features:** Vision Pro support

**In-app purchases:** none


### Planet 2023

[App page](https://appshunter.io/ios/app/planet-2023/id1590863595)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CO2IN free?

CO2IN is free to download, with no in-app purchases.

### Is Planet 2023 free?

Planet 2023 is free to download, with no in-app purchases.

### Do CO2IN or Planet 2023 have ads?

Neither CO2IN nor Planet 2023 shows ads.

### Which is updated more often, CO2IN or Planet 2023?

CO2IN ships an update every 2 months, and Planet 2023 every 2 days. Most recently, CO2IN was updated on November 3, 2026 and Planet 2023 on November 3, 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.*