With Planet Builder, you are the architect of your own solar system. Build planets and moons, and choose their attributes such as name, size, orbit speed, spin speed, tilt, rings, orbit distance, and appearance. Watch them orbit in real-time 3D, creating trails behind them as they circle the sun.

Want to make things interesting? Press the asteroid attack button and watch as asteroids knock your planets out of orbit! Or, shoot asteroids at them yourself with the Asteroid Cannon.

Make your sun go Supernova and turn into a black hole, and suck all your planets in.

Increase or decrease the sun gravity, or activate Planetary Gravity, which gives each planet it's own gravitational field.

Or, start in Quick Start mode and enter our Solar System, with all 8 planets (and Pluto!) and their major moons, and the asteroid belt. High resolution textures and recent pictures of Pluto from the New Horizons space probe add an extra layer of realism.

What’s New

Version 1.01

This app has been updated by Apple to use the latest Apple signing certificate.

Ratings and Reviews

4.5 out of 5
57 Ratings

57 Ratings

And manotany. ,

This is great, but...

This is great, it is basically a mini version of Universal Sandbox! However there is one fatal flaw. There is no save option! And even worse, it takes time to set everything up! You could spend an hour making a really complex solar system, but as soon as you leave, it is gone forever! If you make a save option, this would be a five star app. No doubt.

Skullxkiller103 ,

Here's some ideas.

I think you're game is awesome but I think you could spice it up a little. First, I think you should add a save file. Second, I think you should add a feature were you pick a photo and it wraps around the planet making it look your photo. Third, you should add a space flight simulator to fly around your solar system. Fourth, this is one of my favorites! So all the solar systems you have saved are in a galaxy, and you can click on them to see them, also in your spaceship flight simulator you can drive to them. Fifth, you should add more planet/moon textures, for example, Mimas, Ceres, Jupiters moons, and much more. Sixth, this is the last one, when adding photos for your planet textures you should be able to add what you're planet looks at night, yup you can add city lights. Hope you took the time to read this and add it in your game, thanks.

simon tarquez ,

Fun little game!

The graphics are pretty tight, the physics and Gravity is on the money, and the asteroid target practice is awesome. It's excellent when the sun's Gravity is maxed out, curving the trajectory of your roids for more challenging targeting. With such a great foundation, there is a lot of room for expansion in future updates (perhaps binary systems with each star playing for Gravity, user customizable planet scapes, close up world mode where you enter a sub game and build planets from core to mantle, to the and terrain). I definitely recommend this's a load of fun!!!

App Privacy

The developer, David Nelson, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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