Comparison

Solar System (Lite) 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

Solar System (Lite)

Explore the Solar System with interactive simulations and size comparisons. This educational app makes learning about planets, galaxies, and space exploration engaging for children. It offers a kid-friendly interface with no ads or in-app purchases.

Highlights
  • Interactive simulations
  • Size comparisons of celestial bodies
  • Planetary orbital speed visualization
  • Covers Milky Way, Sun, planets, dwarf planets
  • Kid-friendly navigation
  • No ads or in-app purchases
Features
Read full description

The perfect way for kids to experience the Solar System in a hands-on way! This interactive science book contains a select 18 pages from the full version of the app. ----- INTERACTIVE CONTENT ----- Even as an adult, it can be difficult to visualize just how massive the Sun is or how fast the different planets orbit the Sun. This app uses interactive simulations to allow children to explore these hard to visualize topics in a hands-on way. •••• Size Comparison •••• This page allows children to compare the sizes of many Solar System objects. Comparable objects include the Sun, the planets, major moons, and all the dwarf planets. •••• Planetary Revolutions •••• The planets are shown orbiting the Sun at their comparative speeds. Selecting Neptune reveals it takes 164.8 Earth years to orbit the Sun once while the inner planets seem to orbit the Sun at a dizzying speed. Select Mercury, with a year of 88 Earth days, and the outer planets barely seem to move at all. ----- TOPICS COVERED ----- • The Milky Way galaxy • The Sun • A list of the planets • A list of the dwarf planets • Planetary size comparisons • Planet orbital speeds • The history of space exploration ----- KID FRIENDLY ----- • Easy to use page navigation and search • NO ads • NO in-app purchases ----- FULL VERSION ----- For a more in depth look at the Solar System, consider buying the full version. The full version contains 58 pages of content! •••• Parents •••• The full version of the app is sure to captivate any child with its myriad of interesting facts, striking visuals, and engaging 3D simulations. Not only is the content fascinating to explore, it's educational too! Designed with grade school curriculum in mind, the app covers the major topics of the Solar System while explaining concepts in an easy to understand manner. •••• Teachers •••• Many schools with iPads in the classroom have already used the full version of the app with great success. The interactive content is well suited for teaching complex topics such as planetary seasons and the vast distances of the Solar System. Children can explore this information independently or with the aid of a teacher. ----- MORE INFORMATION ----- Visit http://vosonos.net/product/solar-system-lite

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

Planet Fun4 screens

Verdict

The call

The clearest difference is rating: Planet Fun at 4.8 against Solar System (Lite)'s 4.5. Planet Fun also leads on update cadence (every 4 weeks vs every 3 months) and device support (3 vs 1). Solar System (Lite)'s advantage is iOS requirement (8.0 vs 11.0). 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 4.5. Both are backed by a comparable volume of ratings — 23 and 8 respectively.

UpkeepUpdate frequency

Solar System (Lite) ships an update every 3 months, Planet Fun every 4 weeks. The most recent releases landed on July 6, 2026 and June 4, 2026 respectively.

Scorecard4 real differences · 6 level
Solar System (Lite) versus Planet Fun: the parameters behind the verdict, then further details
ParameterSolar System (Lite)Planet Fun
PriceFreeFree
Rating4.5 (23 ratings)4.8 (8 ratings) — better
Positive reviews83.3% of reviews—
Number of ratings23 — better8
Update frequencyEvery 3 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPadiPhone, iPad, iPod — better
Requires iOS8.0 — better11.0
Further details — not scored
Size91 MB161 MB
Age rating4+4+
DeveloperVosonos LLCOmar reis

Customer experience

Solar System (Lite)

All ratings23 ratings
Positive87.0%
Neutral0.0%
Negative13.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Planet Fun

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

In-app purchases

None

Solar System (Lite)

No in-app purchases

None

Planet Fun

No in-app purchases

Questions

Is Solar System (Lite) free?
Solar System (Lite) 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, Solar System (Lite) or Planet Fun?
Planet Fun is rated higher. Solar System (Lite) averages 4.5 out of 5 from 23 ratings, while Planet Fun averages 4.8 from 8 ratings.
Do Solar System (Lite) or Planet Fun have ads?
Neither Solar System (Lite) nor Planet Fun shows ads.
Which is updated more often, Solar System (Lite) or Planet Fun?
Solar System (Lite) ships an update every 3 months, and Planet Fun every 4 weeks. Most recently, Solar System (Lite) was updated on July 6, 2026 and Planet Fun on June 4, 2026.

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