Comparison

CO2 Modeller vs CO₂ AR

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
Read full description

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

CO₂ AR

Features
Read full description

When burning coal, oil and gas, carbon dioxide—also known as CO₂—is released into the atmosphere. To date, CO₂ emissions have risen dramatically. In the short industrial history of just 250 years, humans have increased the amount of CO₂ in the atmosphere by around 40 %. An alarming value unprecedented on Earth in the past four million years. Humankind has accumulated CO₂ and other greenhouse gases in the atmosphere which has already increased average global temperature by one degree Celsius since 1750. Our app allows you to visualise the history of CO₂ emissions—and also the possible futures. By combining data from the Carbon Dioxide Information Analysis Center (CDIAC) and the baseline projections of CO₂ emissions by the Potsdam Institute for Climate Impact Research (PIK), we were able to visualize the CO₂ emissions from 1751 to 2100 on a highly detailed geographical level. The app also provides you with two possible CO₂ futures: one with a policy of measures against climate change—and one without.

Screenshots

CO2 Modeller4 screens
CO₂ AR2 screens

Verdict

The call

The clearest difference is update cadence: CO₂ AR at daily against CO2 Modeller's every 36 months. On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CO2 Modeller ships an update every 36 months, CO₂ AR daily. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

Scorecard1 real difference · 9 level
CO2 Modeller versus CO₂ AR: the parameters behind the verdict, then further details
ParameterCO2 ModellerCO₂ AR
PriceFreeFree
Rating2.5 (2 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 36 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.111.0 — better
Further details — not scored
Size9 MB95 MB
Age rating4+4+
DeveloperAlex RogersEkkehard Petzold

In-app purchases

None

CO2 Modeller

No in-app purchases

None

CO₂ AR

No in-app purchases

Questions

Is CO2 Modeller free?
CO2 Modeller is free to download, with no in-app purchases.
Is CO₂ AR free?
CO₂ AR is free to download, with no in-app purchases.
Do CO2 Modeller or CO₂ AR have ads?
Neither CO2 Modeller nor CO₂ AR shows ads.
Which is updated more often, CO2 Modeller or CO₂ AR?
CO2 Modeller ships an update every 36 months, and CO₂ AR daily. Most recently, CO2 Modeller was updated on October 2, 2026 and CO₂ AR on September 30, 2026.

Other comparisons