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A space simulator on a phone
Most 3D space programs are built for a desktop. This page sets out which run on a phone, from each one's own pages as read on 7 November 2026. Space Radar runs in a phone's browser with WebGL and needs no app store.
Open Space Radar
Free, in the browser, no account.
Side by side
| On a phone | Read from | |
|---|---|---|
| SpaceEngine | No: its FAQ rules out a mobile version | SpaceEngine's FAQ |
| Solar System Scope | Yes, as apps for iOS and Android (10 million+ installs on Google Play); its web version is for desktops | Google Play, App Store |
| Cosmoscope | In a browser with WebGL2; about 36 MB on first load | cosmoscope.space |
| CosmosMap | WebGPU only, which many Android phones lack; an iPad app | cosmosmap.org |
| Space Radar | In the phone's browser with WebGL and touch; first load about 1.9 MB (measured 7 November 2026); can be added to the home screen | This project |
What the others do that Space Radar does not
- Solar System Scope's apps are in 19 languages, with a VR app.
- Cosmoscope draws millions of stars in 3D and the asteroid belt at catalogue scale.
- CosmosMap has a lab of 184 science simulations, and wider sets of planetary terrain to walk on than Space Radar's landing sites.
- SpaceEngine, on a PC, lets you land anywhere on procedural worlds.
What Space Radar does on a phone
- Live satellites and the space station, with the passes over your place.
- Tonight's sky events: eclipses, meteor showers, conjunctions.
- 33 narrated trips and 11 languages (machine-drafted, under review), and a copy that runs offline.
- Free and open source, with no app store and no account.
How this page was checked
What it says about SpaceEngine, Solar System Scope, Cosmoscope or CosmosMap was read on 7 November 2026 from SpaceEngine's FAQ, Solar System Scope, its Google Play page, Cosmoscope, CosmosMap, in the project's competitor review. Products change: if something here is out of date, tell us on GitHub (it needs a free GitHub account) and it will be corrected. Space Radar is not connected with SpaceEngine, Solar System Scope, Cosmoscope or CosmosMap, and the names are their makers' trademarks.