Sky Map & Star Identification Apps
These apps help you identify stars, constellations, planets, and deep-sky objects by pointing your phone at the sky. Essential for learning your way around the night sky.
SkySafari
The most powerful and comprehensive astronomy app available. SkySafari is essentially a planetarium in your pocket with databases containing millions of stars, galaxies, nebulae, and solar system objects.
Key Features:
- Real-time sky simulation: Point your device at the sky and see constellations, stars, planets overlay in AR
- Massive database: 120,000 stars (Basic) up to 25 million stars, 740,000 galaxies (Pro)
- Time travel: View sky from any location on Earth at any time past or future
- Satellite tracking: Track ISS and thousands of satellites with predictions
- Telescope control: Connect to computerized telescopes (Plus/Pro)
- Night vision mode: Red theme preserves dark adaptation
- Search & notifications: Find any object, get alerts for events
Best For:
Serious amateur astronomers, telescope owners, anyone wanting the most comprehensive sky reference. Worth the higher price if you're committed to astronomy.
Our Verdict:
Industry-leading features and accuracy. Basic version is excellent for most users. Upgrade to Plus or Pro if you have a telescope or want advanced features.
Stellarium Mobile
Based on the renowned desktop planetarium software, Stellarium Mobile brings beautiful, realistic sky rendering to your phone. Free version is surprisingly capable.
Key Features:
- Photorealistic sky: Gorgeous rendering with realistic Milky Way, nebulae, and galaxies
- Free database: 600,000+ stars, all planets, major moons, 80,000+ deep sky objects
- Beautiful constellation art: Multiple culture's constellation imagery
- Time controls: Speed up time to watch planets move, predict sky for any date
- Plus upgrade adds: No ads, more objects (1.69 billion stars), telescope control, advanced features
Best For:
Beginners wanting a beautiful, free introduction to astronomy. Those who value aesthetics and realism. Great learning tool.
Our Verdict:
Best free astronomy app. Gorgeous interface, intuitive controls. Free version is sufficient for most casual users. Plus upgrade is excellent value.
Star Walk 2
The most user-friendly and visually stunning sky guide. Perfect for families and casual stargazers who want something that just works beautifully.
Best For:
Complete beginners, families with kids, casual users wanting simplicity and beauty over advanced features.
Satellite Tracking Apps
Specialized apps for tracking the ISS, Starlink, and other satellites. More focused than general astronomy apps.
ISS Detector
The best dedicated satellite tracking app. Simple, accurate, and packed with useful features specifically for ISS and satellite watching.
Key Features:
- Push notifications: Alerts 15 min before ISS passes (customizable)
- AR mode: Point phone at sky to see exactly where satellite is
- Compass integration: Shows direction and altitude in real-time
- Weather integration: Shows cloud cover predictions
- Starlink extension: Track Starlink trains with predictions
- Multiple satellites: Hubble, Tiangong, GPS, amateur radio satellites
Our Verdict:
Essential app for satellite watchers. $1.99 is a steal for the functionality. The Starlink extension ($0.99) is worth it if you want to catch satellite trains. See our satellite spotting guide for tips.
Heavens-Above
The most comprehensive satellite prediction tool. Website is more powerful than app. Shows hundreds of satellites with precise predictions and star charts. Read more in our ISS photography guide.
Best For:
Serious satellite observers wanting detailed predictions. Ham radio operators. Astrophotographers planning ISS shoots.
Launch Tracking Apps & Websites
Stay informed about upcoming rocket launches with real-time countdowns and notifications.
Spaceflight Tracker (This Site!)
WebReal-time launch tracking with live countdowns, mission details, and agency filters. No app download required - works in any browser.
Key Features:
- Live countdowns to T-0
- Filter by agency (SpaceX, NASA, Blue Origin, etc.)
- Mission descriptions and rocket details
- Links to live streams when available
- Status indicators (Go, TBD, Hold, Success)
Check our launches page for the latest schedule. See our launch viewing guide for tips.
Next Spaceflight & Space Launch Now
Comprehensive launch database with excellent filtering, notifications, and community features. App and website complement each other well.
Best For:
Launch enthusiasts wanting push notifications for every launch worldwide. Great for following specific agencies or launch sites.
Spaceflight Now
WebLong-running spaceflight news site with detailed launch schedule, mission updates, and in-depth coverage. More journalistic than database-focused.
Official Space Agency Apps
Direct from the source - official apps from space agencies provide authoritative information and unique content.
NASA App
Official NASA app with access to thousands of images, videos, mission information, and live NASA TV. The most comprehensive official space agency app.
Key Features:
- 19,000+ images from missions and telescopes
- Live NASA TV stream and on-demand videos
- Latest NASA news and mission updates
- ISS sighting opportunities (Spot The Station)
- Access to NASA podcasts and social media
- Astronomy Picture of the Day (APOD)
- Mission information for all NASA spacecraft
- Notifications for launches and major events
Our Verdict:
Essential app for space enthusiasts. Completely free with no ads. Best source for official NASA content, images, and live coverage. The APOD feature alone is worth the download.
ESA (European Space Agency)
Official app from the European Space Agency. Great for following ESA missions, Ariane launches, and European space exploration efforts.
Meteor Shower & Sky Event Apps
Track meteor showers, eclipses, and other astronomical events with these specialized tools.
Meteor Shower Calendar
Dedicated meteor shower tracker with notifications for peak viewing times. Shows radiant point, expected meteor rates (ZHR), and moon phase for each shower.
Best For:
Meteor enthusiasts wanting alerts for all annual showers. Check our meteor shower guide for viewing tips.
SkEye
AndroidAndroid-only planetarium app optimized for telescope use. Shows field of view circles for different eyepieces, perfect for telescope pointing.
Quick Comparison Guide
| App/Tool | Best For | Price | Platform |
|---|---|---|---|
| SkySafari Plus | Serious astronomers | $14.99 | iOS, Android |
| Stellarium Mobile | Free beauty & accuracy | Free | iOS, Android |
| Star Walk 2 | Beginners & families | $2.99 | iOS, Android |
| ISS Detector | Satellite tracking | $1.99 | iOS, Android |
| Heavens-Above | Detailed sat predictions | Free | Web, iOS, Android |
| NASA App | Official NASA content | Free | iOS, Android |
| Spaceflight Tracker | Launch countdowns | Free | Web |
Our Recommendations by User Type
Complete Beginner
- 1.Stellarium Mobile (Free) — Learn constellations and planets
- 2.NASA App (Free) — Stunning images and educational content
- 3.Spaceflight Tracker (Free) — Follow upcoming launches
Total cost: $0
Casual Stargazer
- 1.SkySafari Basic ($2.99) — More features than free apps
- 2.ISS Detector ($1.99) — Never miss the ISS
- 3.Meteor Shower Calendar ($2.99) — Track annual showers
Total cost: $7.97
Serious Amateur Astronomer
- 1.SkySafari Plus ($14.99) — Telescope control & advanced features
- 2.ISS Detector + Extensions ($3.97) — Complete satellite suite
- 3.Heavens-Above (Free) — Detailed predictions
- 4.NASA App (Free) — Official resources
Total cost: $18.96
Launch Enthusiast
- 1.Spaceflight Tracker (Free) — Real-time countdowns
- 2.Space Launch Now (Free) — Push notifications for all launches
- 3.NASA App (Free) — NASA TV live streams
- 4.Twitter/X — Follow @SpaceX, @NASA, @SpaceflightNow
Total cost: $0