Comparison

CelestialGuide vs The Earth Science Trivia

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

Head to head
About

CelestialGuide

Explore the cosmos with an interactive sky map that displays stars, planets, and celestial events. Point your device at the sky to see a real-time representation of your surroundings, with adjustable visibility settings for stars.

Highlights
  • Interactive sky map
  • Real-time celestial tracking
  • Adjustable star visibility
  • Planet and comet locations
  • Eclipse and transit rendering
  • Messier Object database
  • Virtual Orrery
Features
Read full description

Celestial Guide is an interactive database of information about stars and planets. Its basic interface is a map of the sky as seen from any point on Earth at any point in time. The user can manually choose the time and location, or the iPhone's or iPad's GPS and clock can be used to select the current time and location. If the device is pointed at the sky, the map on the screen will be presented corresponding to the actual view in that direction. The star database includes stars brighter than magnitude 9. The user can select the minimum visible magnitude, which allows the map to conform to the stars which are visible to the user based on local viewing conditions. CelestialGuide presents accurate locations of planets and comets, including rendering of eclipses, transits and occultations that are visible from the selected location. CelestialGuide also has a database of Messier Objects. CelestialGuide also includes a Virtual Orrery, displaying the relative position of the planets and comets at any point in time.

About

The Earth Science Trivia

Features
Read full description

Test your knowledge of geology, weather, and earth structure! Learn, review, and explore Earth science with fun quizzes. The Earth Science Trivia is designed for students, teachers, and science enthusiasts who want to test and expand their knowledge of geology, meteorology, astronomy, and environmental science. Engage with fun quizzes covering the Earth’s structure, weather, natural phenomena, and planetary systems. KEY FEATURES : Offline Mode: Access all content and features without an internet connection. Study anywhere, anytime - even on the go. Category-Based Quizzes : Choose from a variety of earth science topics to test your understanding of core concepts such as atmosphere,earth structure or plate tectonics. Interactive Dashboard : Get a clear overview of your learning progress — see how you’re improving and where you need more focus. Quiz Review Mode : Review your answers after each quiz. Learn from your mistakes and reinforce your understanding with detailed feedback. Quiz Statistics: Track your performance with detailed metrics like accuracy, score history, and completion rates. Measure your growth over time. Quiz Search : In-app search to find related questions using keywords. User-Friendly Design : Simple, clean, and intuitive interface built for quick access and stress-free studying.

Screenshots

CelestialGuide4 screens
The Earth Science Trivia4 screens

Verdict

The call

The clearest difference is update cadence: CelestialGuide at every 17 months against The Earth Science Trivia's every 37 months. CelestialGuide also leads on price ($0.99 vs $1.99). The Earth Science Trivia's advantage is iOS requirement (11.0 vs 18.0). 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

CelestialGuide costs $0.99 and The Earth Science Trivia $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CelestialGuide ships an update every 17 months, The Earth Science Trivia every 37 months. The most recent releases landed on June 10, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
CelestialGuide versus The Earth Science Trivia: the parameters behind the verdict, then further details
ParameterCelestialGuideThe Earth Science Trivia
Price$0.99 — better$1.99
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 17 months — betterEvery 37 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.011.0 — better
Further details — not scored
Size17 MB15 MB
Age rating4+4+
DeveloperGeoffrey DommGulsen CAKIR

In-app purchases

None

CelestialGuide

No in-app purchases

None

The Earth Science Trivia

No in-app purchases

Questions

Is CelestialGuide free?
CelestialGuide costs $0.99, with no in-app purchases.
Is The Earth Science Trivia free?
The Earth Science Trivia costs $1.99, with no in-app purchases.
Do CelestialGuide or The Earth Science Trivia have ads?
Neither CelestialGuide nor The Earth Science Trivia shows ads.
Which is updated more often, CelestialGuide or The Earth Science Trivia?
CelestialGuide ships an update every 17 months, and The Earth Science Trivia every 37 months. Most recently, CelestialGuide was updated on June 10, 2026 and The Earth Science Trivia on September 19, 2026.

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