Comparison

Earth's Core vs Planet Fun

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

Head to head
About

Earth's Core

Explore the internal structure of our planet with a detailed view of Earth's layers. Discover the composition, temperature, and depth of each section, from the crust to the core. This educational tool provides a fascinating look beneath your feet.

Highlights
  • Visualize Earth's internal structure
  • Explore planet layers
  • Discover layer temperatures
  • Learn layer depths
  • Detailed look inside the planet
Features
Read full description

The Earth's Core App lets you see our planet’s internal structure. Just point your mobile to the center of the Earth and experience a deep look inside our planet. Right beneath your feet, thousands of kilometers deep, lies a giant ball of molten Iron as hot as the surface of the sun! Explore the Layers of the Earth and their names, discover the temperature and depth of each layer. Feedback and ideas: please send to support@cosmic-watch.com

About

Planet Fun

Explore a 4D solar system simulation with accurate astronomical calculations for planets, moons, and stars. Interact with the celestial bodies using touch gestures, set any date and time, and even view your GPS position in augmented reality.

Highlights
  • 4D solar system simulation
  • Configurable animation speed
  • Augmented reality mode
  • Almanac module with ephemeris calculators
  • Touch gesture controls
  • Star and constellation visualization
Features
Read full description

PlanetFun is a 4D solar system simulation (3D + time) Sun, planets, Moon and star positions are calculated using various astronomical methods. App source code (Delphi Firemonkey) is available at: https://github.com/omarreis/vsop2013 PlanetFun features: * Solar system animation with configurable speed * Set any local date and time * Choose camera target (Sun, planets, etc) * Configurable camera distance-to-target * Touch gestures: one finger pan, two finger zoom, two finger rotation * show planet orbits. Each orbit is represented by 52 dots (for Earth it is one dot per week) * Heliocentric axis (x and z) * VSOP2013 and VSOP87 planet position calculations * Moon positions calculations ELP2000 * Star background image with 42455 stars of the Hipparcos Input Catalogue * Star and constellation lines and names ( a celestial sphere image ) * Constellation drawings ( 31 constellations ) * actual 3D spheres for the 150 brightest stars * Lighthouse on Earth on your GPS position * phone in the scene is positioned according to phone sensors (Azimuth,Elevation,Roll) * click the phone button to enter augmented reality mode. * Almanac module allows exploring the ephemeris calculators (stars, planets, Sun, Moon, Earth) controls: * camera distance and angle of view. * planet scales * local time, time animation speed * control visibility of various interface elements * app uses sensors compass, gyro and GPS - requires permission This app collects no user data.

Screenshots

Earth's Core3 screens
Planet Fun4 screens

Verdict

The call

The clearest difference is rating: Planet Fun at 4.8 against Earth's Core's 4.3. Planet Fun also leads on update cadence (every 4 weeks vs every 70 months). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Planet Fun holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 4 and 8 respectively.

UpkeepUpdate frequency

Earth's Core ships an update every 70 months, Planet Fun every 4 weeks. The most recent releases landed on August 31, 2026 and June 4, 2026 respectively.

Scorecard2 real differences · 8 level
Earth's Core versus Planet Fun: the parameters behind the verdict, then further details
ParameterEarth's CorePlanet Fun
PriceFreeFree
Rating4.3 (4 ratings)4.8 (8 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings48 — better
Update frequencyEvery 70 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.011.0 — better
Further details — not scored
Size54 MB161 MB
Age rating4+4+
DeveloperCelestial Dynamics AGOmar reis

Customer experience

Earth's Core

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Planet Fun

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%

In-app purchases

None

Earth's Core

No in-app purchases

None

Planet Fun

No in-app purchases

Questions

Is Earth's Core free?
Earth's Core is free to download, with no in-app purchases.
Is Planet Fun free?
Planet Fun is free to download, with no in-app purchases.
Which has better reviews, Earth's Core or Planet Fun?
Planet Fun is rated higher. Earth's Core averages 4.3 out of 5 from 4 ratings, while Planet Fun averages 4.8 from 8 ratings.
Do Earth's Core or Planet Fun have ads?
Neither Earth's Core nor Planet Fun shows ads.
Which is updated more often, Earth's Core or Planet Fun?
Earth's Core ships an update every 70 months, and Planet Fun every 4 weeks. Most recently, Earth's Core was updated on August 31, 2026 and Planet Fun on June 4, 2026.

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