Comparison

CO2 Modeller vs Climate Trail & eBook

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

Climate Trail & eBook

Navigate a post-apocalyptic world where climate change has rendered much of the planet uninhabitable. Lead survivors north to Canada, making critical decisions to overcome heatwaves, starvation, and other threats. The game includes an educational eBook and quiz on climate change.

Highlights
  • Survival simulation gameplay
  • Climate change education
  • Integrated eBook and quiz
  • Resource management
  • Challenging gameplay
  • Hidden object game mode
Features
Read full description

Will You Survive The Climate Apocalypse? (Award Winner - Serious Play 2020) Survive the climate apocalypse by journeying north to Canada. In the tradition of the Oregon Trail, you’ll lead a band of survivors facing horrible heatwaves, superstorms, thirst, starvation, and yes … even dysentery. Your decisions mean life or death for your party, and YOU. "This is a challenging and moving game. It’s about time we had a game like this." - User Review "This game is fun and teaches about the implications of climate change - we need more titles like this one out there!" - Lordanstein “The Climate Trail is like the Oregon Trail set in a post-apocalyptic [world].” - GameFreaks. “A bleak look at what awaits us if we fail to address climate change.” GamesIndustry.Biz The Climate Trail also includes a Climate eBook covering all aspects of Climate Change. Use this as a portable reference on climate issues and sharpen your knowledge with a quick climate quiz. “I know less about computer games than anyone alive, but here's one that's about 'climate refugees fleeing ever-worsening conditions after inaction on climate has rendered much of the USA (and the world) uninhabitable.' So, enjoy!” - Bill McKibbin, Founder 350.org === FEATURES INCLUDE: === ● 100% FREE and NO ADS! Our goal is to educate and motivate. That’s why this game is totally FREE and without ADS! Immerse yourself in this post-apocalyptic world without distracting ads. ● IMMERSIVE STORY AND GAMEPLAY Experience what it feels like to be one of the few survivors of the Climate Apocalypse. Manage resources to stay alive and make the journey to your destination. Feel desperation and urgency as your resources grow less and less, and hope when you successfully face the challenges on the way. You’ll explore and learn about how climate change affects every human being on the planet. ● GREAT CHALLENGES Even if you are a seasoned player, you will still need to think and strategize to be able to make it alive in this game. Multiple difficulty levels make the game challenging for even the most experienced gamer. NEW: Hidden Object Game for finding supplies. ● EDUCATIONAL VALUE Our mission is to educate everyone about the cause and the effects of climate change. You will learn the scientific facts about what’s currently happening to our Earth. The included eBook is an excellent reference on all climate issues and is accessible at any time during the game. ● GREAT GRAPHICS AND GAME DESIGN Climate Trail is created by an industry veteran who co-designed the very first released iPhone game. We work hard to make sure this game has excellent graphics and is enjoyable to play. So, what are you waiting for? Are you ready to play as a climate refugee and survive all the obstacles? Download and play Climate Trail NOW! --- Please leave us excellent feedback and ratings. We urge you to also share this game with everyone you know so they too can play and learn about climate change from The Climate Trail. Thank you!

Screenshots

CO2 Modeller4 screens
Climate Trail & eBook4 screens

Verdict

The call

The clearest difference is price: CO2 Modeller at Free against Climate Trail & eBook's $0.99. CO2 Modeller also leads on review sentiment (75% vs 55%) and iOS requirement (12.1 vs 15.6). Climate Trail & eBook's advantage is rating (4.1 vs 2.5) and update cadence (every 3 weeks vs every 36 months). On 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

CO2 Modeller is free to download; Climate Trail & eBook costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Climate Trail & eBook holds the better App Store score, 4.1 against 2.5. That said, the two scores are not equally well evidenced: Climate Trail & eBook has 27 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 75% of CO2 Modeller's written reviews are positive against 55% of Climate Trail & eBook'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, Climate Trail & eBook every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
CO2 Modeller versus Climate Trail & eBook: the parameters behind the verdict, then further details
ParameterCO2 ModellerClimate Trail & eBook
PriceFree — better$0.99
Rating2.5 (2 ratings)4.1 (27 ratings) — better
Positive reviews75.0% of reviews — better54.5% of reviews
Number of ratings227 — better
Update frequencyEvery 36 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.1 — better15.6
Further details — not scored
Size9 MB94 MB
Age rating4+9+
DeveloperAlex RogersOne Tap Trivia

Customer experience

CO2 Modeller

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

Climate Trail & eBook

All ratings27 ratings
Positive74.1%
Neutral7.4%
Negative18.5%
Written reviews11 reviews
Positive54.5%
Neutral18.2%
Negative27.3%

In-app purchases

None

CO2 Modeller

No in-app purchases

None

Climate Trail & eBook

No in-app purchases

Questions

Is CO2 Modeller free?
CO2 Modeller is free to download, with no in-app purchases.
Is Climate Trail & eBook free?
Climate Trail & eBook costs $0.99, with no in-app purchases.
Which has better reviews, CO2 Modeller or Climate Trail & eBook?
Climate Trail & eBook is rated higher. CO2 Modeller averages 2.5 out of 5 from 2 ratings, while Climate Trail & eBook averages 4.1 from 27 ratings.
Do CO2 Modeller or Climate Trail & eBook have ads?
Neither CO2 Modeller nor Climate Trail & eBook shows ads.
Which is updated more often, CO2 Modeller or Climate Trail & eBook?
CO2 Modeller ships an update every 36 months, and Climate Trail & eBook every 3 weeks. Most recently, CO2 Modeller was updated on November 2, 2026 and Climate Trail & eBook on November 3, 2026.

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