# CO2 Modeller vs CO2 Shopper

The clearest difference is update cadence: CO2 Shopper at monthly against CO2 Modeller's every 36 months. 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 Modeller ships an update every 36 months, CO2 Shopper monthly. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | CO2 Modeller | CO2 Shopper |
| --- | --- | --- |
| 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 | **Monthly** |
| Monetization | Free | — |
| Size | 9 MB | 30 MB |
| Requires iOS | 12.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alex Rogers](https://appshunter.io/developer/346832869) | [Laurence Wayne](https://appshunter.io/developer/1739552943) |

## 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


### CO2 Shopper

[App page](https://appshunter.io/ios/app/co2-shopper-eco-ai-scanner/id6740829074)

**In-app purchases:** none


## Frequently asked questions

### Is CO2 Modeller free?

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

### Is CO2 Shopper free?

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

### Do CO2 Modeller or CO2 Shopper have ads?

Neither CO2 Modeller nor CO2 Shopper shows ads.

### Which is updated more often, CO2 Modeller or CO2 Shopper?

CO2 Modeller ships an update every 36 months, and CO2 Shopper monthly. Most recently, CO2 Modeller was updated on November 2, 2026 and CO2 Shopper on October 30, 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.*