Comparison

Earth Primer vs Cretapedia

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

Head to head
About

Earth Primer

Explore Earth's geological processes through interactive play. Sculpt mountains, create volcanoes, and manipulate natural forces to understand planetary science in a fun, engaging way.

Highlights
  • Discover how Earth works through play
  • Control natural forces like volcanoes and tectonic plates
  • 20 different tools to unlock
  • Richly interactive geological simulations
  • Five chapters: Earth's Interior, Surface, Water Cycle, Biomes, and Sandbox
  • Sandbox mode for open-ended play
Read full description

Discover how our planet works through play! Create volcanoes, sculpt mountains, and control the forces of nature with your fingertips. Earth Primer defies existing genres, combining aspects of science books, toys, simulations, and games. It is a new kind of interactive experience which joins the guided quality of a book with open ended simulation play. • App Store Best of 2015 • Best New App • Featured Education App • "BEAUTIFUL ... ENGAGING ... WELL DESIGNED." –Kristie Lu Stout | CNN “EFFORTLESSLY BEAUTIFUL... perfectly...realizes the promise of a truly interactive textbook.” –John Brownlee | Fast Company "THE FUTURE OF EDUCATION... sets a high benchmark for what educational apps should be aspiring to." –Luke Dormehl | Cult of Mac “INSPIRING ... a reminder that interactive media is a young and undeveloped world itself.” –Kyle VanHemert | WIRED “PLAYFUL, child-like, beautifully designed reenvisioning of the book” –IndieCade “The MOST AWESOME APP EVER for teaching Geomorphology to a young audience” –Alan Parkinson | Award Winning Teacher “one of the most deluxe, and memorable educational apps available... AN ABSOLUTE MUST” 5/5 –Trevor Sheridan | Apple n Apps “A TOUR DE FORCE” –Bret Victor "This is much more than a toy. It is a catalyst for thinking about our world. ... TRULY A JOY." –Samuel Arbesman | WIRED "I want every book to be this awesome. ...ABSOLUTELY WORTH EVERY CENT." –Owen Williams | The Next Web Features • Discover how Earth works through play. • The forces of nature are at your fingertips—make volcanoes, shape sand dunes, form glaciers, sculpt mountains, push around tectonic plates, paint with wind, heat up magma—and more! • 20 different tools to unlock. • Richly interactive geological simulations. • Five chapters: Earth's Interior, Surface, Water Cycle, Biomes, and Sandbox. • Sandbox mode.

About

Cretapedia

An ad-free educational app for children aged 5-12, offering engaging science lessons through interactive 3D animations and fun quizzes. It covers over 20 topics, fostering curiosity and developing critical thinking skills in a playful, story-driven environment.

Highlights
  • 20+ science topics
  • Bite-sized lessons
  • Fun quizzes
  • 3D animations
  • Interactive models
  • Develops critical thinking
  • Story-driven content
Features
Read full description

Smarter screen time! A safe, ad-free space where kids 5–12 can explore science with confidence. 1. Discover Fascinating Topics From animals to space, 20+ fascinating topics that spark curiosity Bite-sized lessons make even complex ideas easy to grasp Fun quizzes keep kids motivated and proud of progress 2. See Learning Come Alive Stunning 3D animations bring abstract concepts to life Interactive models let kids zoom, rotate, and explore in detail 3. Grow Future-Ready Skills Boost focus, memory, and observation through exploration Develop critical thinking, problem-solving, and creativity Strengthen imagination and curiosity—the foundation of lifelong learning 4. Learning that Feels Like Play Story-driven content keeps kids engaged start to finish Gamified progress makes learning fun, not forced Every session feels like an adventure, not a lecture Current Courses Available: Biology & Health: Human Body, Microorganisms Earth & Space Sciences: Rocks and Minerals, Weather and Climate, Space, Landforms Physical Sciences: Physics, Chemistry Animals & Plants: Dinosaurs, Fish, Insects, Birds, Plants, Marine Animals, Mammals, Amphibians, African Animals, Paleozoic Animals Engineering & Technology: Great Inventions, Machines History & Social Sciences: Ancient Civilizations, European Civilization, Chinese Architecture Coming Soon: Math Is Fun, Mushrooms, Forest Animals, Mars, Air and Space, Transportation, Agriculture, Toxic Creatures, Brain Science, Diseases, Reptiles, and more! READY TO EXPLORE? Spark your child’s curiosity and ignite a lifelong love of science. Download Cretapedia today and start their adventure into the wonders of the natural world! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeul

Screenshots

Cretapedia4 screens

Verdict

The call

The clearest difference is price: Cretapedia at Free against Earth Primer's $9.99. Cretapedia also leads on ratings volume (1.7K vs 35) and device support (3 vs 1). Earth Primer's advantage is in-app purchases (none vs 11) and review sentiment (75% vs 44%). On rating, update cadence and ads 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

Cretapedia is free to download; Earth Primer costs $9.99 up front. Cretapedia sells 10 in-app purchases, starting at $13.99 per month. Earth Primer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Earth Primer against 4.6 for Cretapedia. That said, the two scores are not equally well evidenced: Cretapedia has 1.7K ratings behind it against 35, so its average is the more settled of the two. Written reviews are what separate them: 75% of Earth Primer's written reviews are positive against 44% of Cretapedia's.

UpkeepUpdate frequency

Earth Primer ships an update every 3 weeks, Cretapedia monthly. The most recent releases landed on June 9, 2026 and September 21, 2026 respectively.

Scorecard7 real differences · 3 level
Earth Primer versus Cretapedia: the parameters behind the verdict, then further details
ParameterEarth PrimerCretapedia
Price$9.99Free — better
Rating4.7 (35 ratings) — better4.6 (1.7K ratings)
Positive reviews75.4% of reviews — better43.7% of reviews
Number of ratings351.7K — better
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS7.0 — better13.0
Further details — not scored
Size185 MB227 MB
Age rating4+4+
DeveloperChaim GingoldAMAZING EDTECH PTE. LTD.

Customer experience

Earth Primer

All ratings35 ratings
Positive91.4%
Neutral2.9%
Negative5.7%
Written reviews65 reviews
Positive75.4%
Neutral3.1%
Negative21.5%

Cretapedia

All ratings1,718 ratings
Positive89.4%
Neutral4.1%
Negative6.5%
Written reviews71 reviews
Positive43.7%
Neutral7.0%
Negative49.3%

Bugs and requests

Earth Primer

Not enough reviews yet to summarise bugs or requests.

Cretapedia

Reported bugs

3 issues
  • Subscription issues and inability to access paid content
  • App closing during sign-up process
  • Compatibility issues with older devices

Requested features

4 requests
  • Add more dinosaur content and battles
  • Improve quiz and review features
  • Offer a more affordable subscription model
  • Provide a neutral perspective on religious topics

In-app purchases

None

Earth Primer

No in-app purchases

10 purchases

Cretapedia

Subscriptions7
  • MONTHLY-30 DAYS FREE1 Month trial$13.991 Month
  • MONTHLY-7 DAYS FREE7 Days trial$13.991 Month
  • MONTHLY-BASIC$13.991 Month
Show 4 more
  • YEARLY-PROMOTION1 Year trial$119.991 Year
  • YEARLY-PROMOTION2 variants$119.991 Year
  • YEARLY-BASIC$119.991 Year
  • YEARLY-7 DAYS FREE7 Days trial$119.991 Year
One-time3
  • Ccoin$10.00
  • Ccoins$20.00
  • Ccoins$50.00

Questions

Is Earth Primer free?
Earth Primer costs $9.99, with no in-app purchases.
Is Cretapedia free?
Cretapedia is free to download, with in-app purchases available.
Which has better reviews, Earth Primer or Cretapedia?
Earth Primer is rated higher. Earth Primer averages 4.7 out of 5 from 35 ratings, while Cretapedia averages 4.6 from 1.7K ratings.
Do Earth Primer or Cretapedia have ads?
Neither Earth Primer nor Cretapedia shows ads.
Which is updated more often, Earth Primer or Cretapedia?
Earth Primer ships an update every 3 weeks, and Cretapedia monthly. Most recently, Earth Primer was updated on June 9, 2026 and Cretapedia on September 21, 2026.

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