CO2 Modeller vs Climate Change Explorer
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.
Climate Change Explorer
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At Historic Environment Scotland, understanding how changes in our climate are impacting our organisation is central to our climate action ambitions. Changes in our climate, such as the increasing frequency and intensity of extreme weather events, introduces a range of physical climate risks to our organisation. This includes risks to our people, the natural capital of our properties, our operations and our physical assets. There are further ‘transition’ climate risks introduced as society takes actions and moves towards a low-carbon economy. Understanding these risks and impacts, and adapting to them, is a key deliverable of our Climate Action Plan with work currently underway. This app lets you explore Edinburgh, Scotland’s capital city and a UNESCO World Heritage site, and how climate change is impacting some of its historic sites. The app is based on a 3D model of the city created for the Scottish Ten project, which sought to accurately record Scotland’s World Heritage sites in 3D using cutting edge technologies, to help support their conservation, management, interpretation and virtual accessibility. FEEDBACK We're always looking for feedback so please send any ideas on how we can improve the app to digitaldocumentation@hes.scot or rate us in the app store.
Screenshots
Verdict
The clearest difference is iOS requirement: CO2 Modeller at 12.1 against Climate Change Explorer's 15.0. On price, update cadence, 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.
CO2 Modeller ships an update every 36 months, Climate Change Explorer every 50 months. The most recent releases landed on October 2, 2026 and September 20, 2026 respectively.
| Parameter | CO2 Modeller | Climate Change Explorer |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (2 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 36 months — better | Every 50 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.1 — better | 15.0 |
| Further details — not scored | ||
| Size | 9 MB | 1017 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Rogers | Historic Environment Scotland |
In-app purchases
CO2 Modeller
No in-app purchases
Climate Change Explorer
No in-app purchases
Questions
Is CO2 Modeller free?
Is Climate Change Explorer free?
Do CO2 Modeller or Climate Change Explorer have ads?
Which is updated more often, CO2 Modeller or Climate Change Explorer?
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