CO2 Modeller vs Relativistic Space
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Relativistic Space
This educational tool simulates the behavior of space and time at high speeds. Developed as part of a master's dissertation, it focuses on relativistic effects without considering acceleration.
- Relativistic velocity simulation
- Space-time behavior visualization
- Pedagogical tool
- Master's dissertation project
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This simple simulator shows how space and time behave at relativistic velocities. It was developed as a pedagogical tool as part of a master's dissertation at the Federal University of Espírito Santo. Thus, it does not take into account the acceleration effects of the spacecraft. It was developed in a partnership between Prof Thiéberson Gomes (UFES), Prof Flávio Gimenes (UFES) and student Luiz Henrique Gobbi, with computational support Rodrigo Marques.
Screenshots
Verdict
The clearest difference is rating: Relativistic Space at 3.0 against CO2 Modeller's 2.5. Relativistic Space also leads on review sentiment (100% vs 75%). CO2 Modeller's advantage is update cadence (every 36 months vs every 75 months). On price, ratings volume, ads and in-app purchases 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.
Relativistic Space 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: 75% of CO2 Modeller's written reviews are positive against 100% of Relativistic Space's.
CO2 Modeller ships an update every 36 months, Relativistic Space every 75 months. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.
| Parameter | CO2 Modeller | Relativistic Space |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (2 ratings) | 3.0 (2 ratings) — better |
| Positive reviews | 75.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 2 |
| Update frequency | Every 36 months — better | Every 75 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.1 — better | 13.0 |
| Further details — not scored | ||
| Size | 9 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Rogers | Thieberson Gomes |
Customer experience
CO2 Modeller
Relativistic Space
In-app purchases
CO2 Modeller
No in-app purchases
Relativistic Space
No in-app purchases
Questions
Is CO2 Modeller free?
Is Relativistic Space free?
Which has better reviews, CO2 Modeller or Relativistic Space?
Do CO2 Modeller or Relativistic Space have ads?
Which is updated more often, CO2 Modeller or Relativistic Space?
Other comparisons
