# Tec2Screen® vs CO2 Modeller

The clearest difference is update cadence: Tec2Screen® at every 6 months against CO2 Modeller's every 36 months. Tec2Screen® also leads on iOS requirement (8.0 vs 12.1). CO2 Modeller's advantage is device support (3 vs 1). On price, 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.

Tec2Screen® ships an update every 6 months, CO2 Modeller every 36 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | Tec2Screen® | CO2 Modeller |
| --- | --- | --- |
| 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 6 months** | Every 36 months |
| Monetization | — | Free |
| Size | 265 MB | 9 MB |
| Requires iOS | **8.0** | 12.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Festo Didactic SE](https://appshunter.io/developer/570174144) | [Alex Rogers](https://appshunter.io/developer/346832869) |

## What reviewers say

### Tec2Screen®

[App page](https://appshunter.io/ios/app/tec2screen/id923374856)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Tec2Screen® free?

Tec2Screen® is free to download, with no in-app purchases.

### Is CO2 Modeller free?

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

### Do Tec2Screen® or CO2 Modeller have ads?

Neither Tec2Screen® nor CO2 Modeller shows ads.

### Which is updated more often, Tec2Screen® or CO2 Modeller?

Tec2Screen® ships an update every 6 months, and CO2 Modeller every 36 months. Most recently, Tec2Screen® was updated on October 29, 2026 and CO2 Modeller on October 29, 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.*