# Planet Fun — Solar system simulation

> 4D solar system simulation with astronomical calculations and augmented reality. (iPhone/iPad app by Omar reis.)

- Source: https://appshunter.io/ios/app/planet-fun/id1525941640 (this page in markdown: same URL + `.md`)
- Developer: [Omar reis](https://appshunter.io/developer/687921629)
- Category: Education, Navigation
- Price: Free
- Rating: 4.75/5 from 8 App Store ratings
- Age rating: 4+
- Requires: iOS 11.0 · 161 MB
- Languages: English
- Released: 2020-08-16
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/planet-fun/id1525941640/reviews.md

## What is Planet Fun?

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.

## Key features

- 4D solar system simulation
- Configurable animation speed
- Augmented reality mode
- Almanac module with ephemeris calculators
- Touch gesture controls
- Star and constellation visualization


## Frequently asked questions about Planet Fun

### What is Planet Fun?

Planet Fun is a 4D solar system simulation that calculates the positions of the Sun, planets, Moon, and stars using astronomical methods. It allows users to explore the solar system with configurable speeds, set any date and time, and even enter augmented reality mode.

### What are the main features of Planet Fun?

Key features include solar system animation with configurable speed, the ability to set any local date and time, touch gesture controls for panning, zooming, and rotating, planet orbit visualization, and an Almanac module for ephemeris calculations.

### Does Planet Fun have ads?

No, Planet Fun does not contain advertisements. It is a completely ad-free application, allowing for an uninterrupted educational experience.

### What devices is Planet Fun available on?

Planet Fun is available on iPhone, iPad, and iPod devices. It is designed to run on iOS platforms.

### How accurate are the astronomical calculations in Planet Fun?

The app utilizes VSOP2013 and VSOP87 for planet position calculations and ELP2000 for Moon positions, ensuring a high degree of astronomical accuracy for educational purposes.

### Can I use Planet Fun offline?

The provided description does not specify offline capabilities. However, given its simulation nature and reliance on sensor data for AR, an internet connection might be required for certain features.

### What is the age rating for Planet Fun?

Planet Fun has an age rating of 4+, making it suitable for young learners and children interested in space and science.

### How often is Planet Fun updated?

The latest version, 2.1, was released on August 11, 2023. The app is updated periodically to improve performance and add new features, with the last update occurring in August 2023.

## Version history (last 5 releases)

### 2.1 — 2023-08-11

- Added program translations: French, Portuguese, Italian, Spanish
- Fixed phone model roll direction ( phone was rolling to the wrong side )

### 2.0 — 2023-06-14

* Fixed near plane/far plane clipping, so nearby  planets are not clipped
* moved Camera and Time editors out of the way ( to the top )

### 1.9 — 2023-04-29

- constellation drawings  on the sky background ( 31 constellations ) - set option in Visibility config

### 1.8 — 2023-04-11

* Fixed error in ecliptic obliquity ( introduced in v1.7 )
* Almanac module with various calculation engines: Planets VSOP2013, VSOP87. Star catalogs: Navigation and Hipparcos 150. Moon ELP2000. 
* A selection of bright stars added as white 3d spheres. These are positioned on the surface of the celestial sphere ( at 200 AU ) 
* Click a 3D object to see object data (coordinates).
* Animated solar system diagram ( in the Almanac module )

### 1.7 — 2023-04-07

* PlanetFun Almanac module with various calculation engines:   Planets VSOP2013, VSOP87. Star catalogs: Navigation and Hipparcos 150. Moon ELP2000. 
* A selection of bright stars added as white 3d spheres.   These are positioned on the surface of the celestial sphere ( at 200 AU ) 
* Click a 3D object to see object data ( coordinates and calculations ).
* Animated solar system diagram ( in the Almanac module )

## Apps similar to Planet Fun

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Stars and Planets - Astronomy](https://appshunter.io/ios/app/stars-and-planets-astronomy/id1170904676) | 4.7 (1,139) | Free | Education |
| [3D Solar System - Planets View](https://appshunter.io/ios/app/3d-solar-system-planets-view/id983877380) | 4.4 (1,603) | Free | Education |
| [ARPlanets 2](https://appshunter.io/ios/app/arplanets-2/id1387711637) | 3.4 (14) | Free | Education |
| [DIY Solar System](https://appshunter.io/ios/app/diy-solar-system/id1644242890) | 4.5 (16) | Free | Education |
| [Planets AR - Our Solar System](https://appshunter.io/ios/app/planets-ar-our-solar-system/id6483760783) | 5.0 (1) | Free | Education |
| [PlanetenSpielundApp2b](https://appshunter.io/ios/app/planetenspielundapp2b/id1494749871) | 3.5 (2) | Free | Education |

## More apps by Omar reis

- [VRTool](https://appshunter.io/ios/app/vrtool/id687921545)
- [Celestial Navigator](https://appshunter.io/ios/app/celestial-navigator/id696927722)
- [CamSextant](https://appshunter.io/ios/app/camsextant/id1076411081)
- [Nassau St](https://appshunter.io/ios/app/nassau-st/id1093819633)
- [OPYC](https://appshunter.io/ios/app/opyc/id1217040844)

All apps by Omar reis: https://appshunter.io/developer/687921629

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*