# CO2 Modeller vs CloudLabs Methane Synthesis

The clearest difference is iOS requirement: CloudLabs Methane Synthesis at 9.0 against CO2 Modeller's 12.1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CO2 Modeller ships an update every 36 months, CloudLabs Methane Synthesis every 28 months. The most recent releases landed on October 2, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | CO2 Modeller | CloudLabs Methane Synthesis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/co2-modeller/id1037101261/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 28 months** |
| Monetization | Free | — |
| Size | 9 MB | 86 MB |
| Requires iOS | 12.1 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alex Rogers](https://appshunter.io/developer/346832869) | [Jiovany Orozco](https://appshunter.io/developer/1114670847) |

## What reviewers say

### CO2 Modeller

[App page](https://appshunter.io/ios/app/co2-modeller/id1037101261)

Simulate the impact of reducing carbon emissions on climate change. This app generates projections for atmospheric CO2 concentration, global warming, sea level rise, and ocean acidification.

**Highlights:** Model carbon emission reductions, Simulate climate change effects, Project CO2 concentration, Estimate global warming, Predict sea level rise, Analyze ocean acidification

**Features:** macOS Compatibility

**In-app purchases:** none


### CloudLabs Methane Synthesis

[App page](https://appshunter.io/ios/app/cloudlabs-methane-synthesis/id1596478330)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CO2 Modeller free?

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

### Is CloudLabs Methane Synthesis free?

CloudLabs Methane Synthesis is free to download, with no in-app purchases.

### Do CO2 Modeller or CloudLabs Methane Synthesis have ads?

Neither CO2 Modeller nor CloudLabs Methane Synthesis shows ads.

### Which is updated more often, CO2 Modeller or CloudLabs Methane Synthesis?

CO2 Modeller ships an update every 36 months, and CloudLabs Methane Synthesis every 28 months. Most recently, CO2 Modeller was updated on October 2, 2026 and CloudLabs Methane Synthesis on September 25, 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.*