Side by side
OpenSpace vs Sky Guide
Both stand on astronomy apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxWindows
Choose OpenSpace if you need free, open-source interactive space visualizations for education, research, or presentations, especially with planetarium and multi-display capabilities. Look elsewhere if you need macOS support or offline access to the full feature set.
Visit OpenSpace Free plan iPhoneMac
Sky Guide combines identification, augmented reality, alerts, time controls, and an event calendar, with offline support and a free plan. Apple device and operating-system requirements apply, and the listed lifetime purchase is a substantial one-time cost.
Visit Sky GuideThe facts
| OpenSpace | Sky Guide | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Windows | iPhone, Mac |
| Lowest paid plan | Free or on request | All Constellations: $1.99, paid once |
| Plans published | 1 | 2 |
| Maker | Not published | Not published |
| Website | openspaceproject.com | fifthstarlabs.com |
| On astronomy apps | #15 of 35 | #19 of 35 |
OpenSpace: what it does well
- Visualizes NASA, ESA, and research-institution data.
- Mission controls support playback, rewinding, scrubbing, and acceleration.
- Includes live and historical space-weather views.
- Catalogs cover planets, galaxies, quasars, and other datasets.
- Supports multi-projector blending and synchronized rendering across machines.
What to know first
- Full functionality requires internet access.
- macOS is no longer supported going forward.
- Minimum requirements include an NVIDIA GTX 1060 or comparable GPU.
Sky Guide: what it does well
- Identifies stars and planets
- Augmented-reality sky view
- International Space Station alerts
- Offline operation
- Personalized astronomical calendar
What to know first
- Apple platforms only
- Requires recent operating-system versions
- PRO Lifetime costs $249.99, paid once
- Developer may collect coarse location data
Alternatives to OpenSpace Alternatives to Sky Guide The whole list