Side by side
Sky Tonight vs Starmap
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 AndroidiPhone
Visit Sky Tonight Free plan iPhoneMac
Starmap combines an offline star and deep-sky catalogue with a compass-guided chart, telescope calculations and live astronomy data. Its listed privacy details distinguish locally stored settings from requests that send an IP address and query.
Visit StarmapThe facts
| Sky Tonight | Starmap | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, iPhone | iPhone, Mac |
| Lowest paid plan | Not published | Free or on request |
| Plans published | None | 1 |
| Maker | Not published | Not published |
| Website | starwalk.space | star-map.fr |
| On astronomy apps | #33 of 35 | #29 of 35 |
Sky Tonight: what it does well
Starmap: what it does well
- Works offline
- On-device catalogue includes 2.5 million stars
- Configures unlimited telescopes and eyepieces
- No ads, accounts, or tracking
- Free plan with no in-app purchases
What to know first
- Available only on iOS and macOS
- Live-data requests include device IP address and query
- Seasonal charts require credit to Starmap
Alternatives to Sky Tonight Alternatives to Starmap The whole list