# Celestial Dances vs CO2 Modeller

The clearest difference is rating: Celestial Dances at 3.0 against CO2 Modeller's 2.5. Celestial Dances also leads on review sentiment (100% vs 75%) and iOS requirement (9.0 vs 12.1). CO2 Modeller's advantage is device support (3 vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

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

Celestial Dances holds the better App Store score, 3.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 100% of Celestial Dances's written reviews are positive against 75% of CO2 Modeller's.

Celestial Dances ships an update every 30 months, CO2 Modeller every 36 months. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Celestial Dances | CO2 Modeller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/celestial-dances/id601885290/reviews)** | [2.5 (2 ratings)](https://appshunter.io/ios/app/co2-modeller/id1037101261/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 30 months** | Every 36 months |
| Monetization | Free | Free |
| Size | 16 MB | 9 MB |
| Requires iOS | **9.0** | 12.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Bretl](https://appshunter.io/developer/553850818) | [Alex Rogers](https://appshunter.io/developer/346832869) |

## What reviewers say

### Celestial Dances

[App page](https://appshunter.io/ios/app/celestial-dances/id601885290)

Explore the orbital mechanics of planets, moons, and exoplanets. This app visualizes celestial movements based on concepts from "A Little Book of Coincidence." Discover intriguing patterns and relationships within our solar system and beyond.

**Highlights:** Explore solar system planet motions, Visualize moon orbits, Discover exoplanet systems, Based on 'A Little Book of Coincidence', Highlights Earth-Venus relationship

**Features:** macOS Compatibility

**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 Celestial Dances free?

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

### Is CO2 Modeller free?

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

### Which has better reviews, Celestial Dances or CO2 Modeller?

Celestial Dances is rated higher. Celestial Dances averages 3.0 out of 5 from 2 ratings, while CO2 Modeller averages 2.5 from 2 ratings.

### Do Celestial Dances or CO2 Modeller have ads?

Neither Celestial Dances nor CO2 Modeller shows ads.

### Which is updated more often, Celestial Dances or CO2 Modeller?

Celestial Dances ships an update every 30 months, and CO2 Modeller every 36 months. Most recently, Celestial Dances was updated on October 3, 2026 and CO2 Modeller on October 19, 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.*