Comparison

CO2 Modeller vs Thermodynamics Calculators

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Model carbon emission reductions
  • Simulate climate change effects
  • Project CO2 concentration
  • Estimate global warming
  • Predict sea level rise
  • Analyze ocean acidification
Features
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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.

About

Thermodynamics Calculators

This app provides engineering professionals with a powerful tool for thermodynamics calculations. It features a comprehensive dataset for various species and a range of building blocks to construct complex models. An illustrative sample model is included for guidance.

Highlights
  • Temperature-dependent property data for 8 species
  • Building blocks for model creation
  • Daisy-chaining blocks for complex models
  • Includes one sample model
  • Validated against commercial software
Features
Read full description

A calculator designed for engineering professionals in Mechanical and Chemical Engineering industries. Validated against state-of-the-art commercial software. Temperature dependent property data set for 8 species - H2O, H2, N2, O2, CO2, Ar, CO and CH4, for accurate calculations. Building blocks available: Burner, Compressor, Expander, Cooler, Heater, Heat Exchanger, CPOX Reformer, SMR Reformer, Fuel Cells (molten carbonate, PEM and solid-oxide) and Water Dropout. User can daisy-chain these building blocks to create basic models. One illustrative sample model included.

Screenshots

CO2 Modeller4 screens
Thermodynamics Calculators4 screens

Verdict

The call

The clearest difference is review sentiment: CO2 Modeller at 75% against Thermodynamics Calculators's 0%. CO2 Modeller also leads on in-app purchases (none vs 3) and device support (3 vs 1). Thermodynamics Calculators's advantage is rating (5.0 vs 2.5) and update cadence (weekly vs every 36 months). On price, ratings volume, ads and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Thermodynamics Calculators sells 3 one-off in-app purchases. CO2 Modeller asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Thermodynamics Calculators holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews complicate that: 75% of CO2 Modeller's written reviews are positive against 0% of Thermodynamics Calculators's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

CO2 Modeller ships an update every 36 months, Thermodynamics Calculators weekly. The most recent releases landed on October 2, 2026 and September 29, 2026 respectively.

Scorecard6 real differences · 4 level
CO2 Modeller versus Thermodynamics Calculators: the parameters behind the verdict, then further details
ParameterCO2 ModellerThermodynamics Calculators
PriceFreeFree
Rating2.5 (2 ratings)5.0 (2 ratings) — better
Positive reviews75.0% of reviews — better0.0% of reviews
Number of ratings22
Update frequencyEvery 36 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.1 — better16.6
Further details — not scored
Size9 MB6 MB
Age rating4+4+
DeveloperAlex RogersLucy Enterprises

Customer experience

CO2 Modeller

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Thermodynamics Calculators

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

CO2 Modeller

No in-app purchases

3 purchases

Thermodynamics Calculators

One-time3
  • Edit option$0.99
  • Remove ads$1.99
  • Modeling access$4.99

Questions

Is CO2 Modeller free?
CO2 Modeller is free to download, with no in-app purchases.
Is Thermodynamics Calculators free?
Thermodynamics Calculators is free to download, with in-app purchases available.
Which has better reviews, CO2 Modeller or Thermodynamics Calculators?
Thermodynamics Calculators is rated higher. CO2 Modeller averages 2.5 out of 5 from 2 ratings, while Thermodynamics Calculators averages 5.0 from 2 ratings.
Do CO2 Modeller or Thermodynamics Calculators have ads?
Neither CO2 Modeller nor Thermodynamics Calculators shows ads.
Which is updated more often, CO2 Modeller or Thermodynamics Calculators?
CO2 Modeller ships an update every 36 months, and Thermodynamics Calculators weekly. Most recently, CO2 Modeller was updated on October 2, 2026 and Thermodynamics Calculators on September 29, 2026.

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