Celestial Dances vs CO2 Modeller
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Celestial Dances
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.
- Explore solar system planet motions
- Visualize moon orbits
- Discover exoplanet systems
- Based on 'A Little Book of Coincidence'
- Highlights Earth-Venus relationship
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This app invites you to explore the relative motions of our solar system's planets, their moons, and several exoplanet systems. It is based on ideas presented in "A Little Book of Coincidence" by John Martineau. Are the amazing patterns created by these orbiting bodies just a coincidence, or is something more than that going on? Take a look and see what you think. Be sure to check out the special relationship between the Earth and Venus.
CO2 Modeller
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.
- Model carbon emission reductions
- Simulate climate change effects
- Project CO2 concentration
- Estimate global warming
- Predict sea level rise
- Analyze ocean acidification
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Model the effect of carbon emissions reductions on climate change using your smartphone or tablet. CO2 Modeller uses a streamlined computationally efficient Earth system model to simulate the effect of carbon emissions reductions on climate change. It generates twenty-first century projections of atmospheric carbon dioxide concentration and global averages of surface warming, sea level rise and ocean acidification.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Celestial Dances | CO2 Modeller |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | 2.5 (2 ratings) |
| Positive reviews | 100.0% of reviews — better | 75.0% of reviews |
| Number of ratings | 2 | 2 |
| Update frequency | Every 30 months — better | Every 36 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 12.1 |
| Further details — not scored | ||
| Size | 16 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Bretl | Alex Rogers |
Customer experience
Celestial Dances
CO2 Modeller
In-app purchases
Celestial Dances
No in-app purchases
CO2 Modeller
No in-app purchases
Questions
Is Celestial Dances free?
Is CO2 Modeller free?
Which has better reviews, Celestial Dances or CO2 Modeller?
Do Celestial Dances or CO2 Modeller have ads?
Which is updated more often, Celestial Dances or CO2 Modeller?
Other comparisons
