Comparison

CO2 Modeller vs CO2 Shopper

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 Shopper

Read full description

Welcome to CO2 Shopper, the ultimate app for eco-conscious consumers! Our app helps you make informed shopping decisions by providing detailed information on the carbon footprint of your shopping items. By understanding the CO2 emissions associated with your purchases, you can take meaningful steps to reduce your environmental impact and contribute to a more sustainable future. Features so far (with more to come): Carbon Footprint Tracking: Easily track the CO2 emissions of your shopping items and see the total impact of your purchases. User-Friendly Interface: Enjoy a clean, intuitive design that makes it easy to navigate and find the information you need. Join the movement towards a more sustainable lifestyle with CO2 Shopper. Every small action counts, and together, we can make a big difference!

Screenshots

CO2 Modeller4 screens
CO2 Shopper3 screens

Verdict

The call

The clearest difference is update cadence: CO2 Shopper at monthly 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 Shopper monthly. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

Scorecard1 real difference · 9 level
CO2 Modeller versus CO2 Shopper: the parameters behind the verdict, then further details
ParameterCO2 ModellerCO2 Shopper
PriceFreeFree
Rating2.5 (2 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 36 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.112.0 — better
Further details — not scored
Size9 MB30 MB
Age rating4+4+
DeveloperAlex RogersLaurence Wayne

In-app purchases

None

CO2 Modeller

No in-app purchases

None

CO2 Shopper

No in-app purchases

Questions

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

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