# CO2 Modeller vs CFWC

The clearest difference is rating: CFWC at 5.0 against CO2 Modeller's 2.5. CFWC also leads on update cadence (every 4 months vs every 36 months). CO2 Modeller's advantage is iOS requirement (12.1 vs 15.1). On price, ratings volume, 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.

CFWC holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

CO2 Modeller ships an update every 36 months, CFWC every 4 months. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CO2 Modeller | CFWC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/co2-modeller/id1037101261/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/cfwc/id1045877240/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 9 MB | 56 MB |
| Requires iOS | **12.1** | 15.1 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Alex Rogers](https://appshunter.io/developer/346832869) | [chowchilla family Worship center](https://appshunter.io/developer/1483659646) |

## 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


### CFWC

[App page](https://appshunter.io/ios/app/cfwc/id1045877240)

Stay connected with your church community. Access past messages, receive important updates via notifications, and share content easily. Download messages for offline listening.

**Highlights:** Watch or listen to past messages, Receive push notifications, Share messages via social media/email, Download messages for offline listening

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CO2 Modeller free?

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

### Is CFWC free?

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

### Which has better reviews, CO2 Modeller or CFWC?

CFWC is rated higher. CO2 Modeller averages 2.5 out of 5 from 2 ratings, while CFWC averages 5.0 from 3 ratings.

### Do CO2 Modeller or CFWC have ads?

Neither CO2 Modeller nor CFWC shows ads.

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

CO2 Modeller ships an update every 36 months, and CFWC every 4 months. Most recently, CO2 Modeller was updated on October 19, 2026 and CFWC on October 24, 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.*