xSky vs Hubble Space Telescope Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
xSky
Explore the cosmos with a virtual telescope. Point your device at the sky to identify celestial bodies. Zoom in for detailed views and use a search function to locate specific objects.
- Virtual telescope functionality
- Identify Sun, Moon, Planets, Stars, Galaxies
- Zoom up to a million times
- Screen lock to stop motion
- Object search arrow
- Soft music and sound effects
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xSky is a simple to use virtual telescope app. Just look at the sky through your device. Lock the screen and zoom in to explore in more detail. Features: • Sun, Moon, Planets, Galilean Moons, Stars, Constellations and Galaxies. • Pinch the screen to zoom up to a million times. • Use lock button to stop motions. • Search arrow will help to locate any object in the sky. • Soft music and sound effects.
Hubble Space Telescope Tracker
Follow NASA's Hubble Space Telescope mission in real time. Explore a gallery of stunning images, engage in discussions, and learn about space. Receive notifications for new discoveries and test your knowledge with quizzes.
- Real-time mission progress
- Image gallery
- Discussion forums
- Notifications for new images
- 3D Solar system model
- Ask an Astronomer feature
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With Hubble Space Telescope Tracker app, you can follow the mission's progress in real time. Check out the latest images in the gallery and discuss topics in the discussions. Receive notifications about new images. App offers - First Images - Live information - Image Gallery - Discussion - Ask an Astronomer - Frequently Asked Questions - Quiz - Wallpapers - 3D Solar system What is Hubble Space Telescope? The Hubble Space Telescope is a powerful space-based observatory launched in 1990. It captures detailed images of distant galaxies and celestial objects in visible, ultraviolet, and infrared light. Positioned above Earth's atmosphere, it provides clear, distortion-free views, leading to groundbreaking discoveries in astronomy. Operated jointly by NASA and ESA, Hubble has significantly expanded our understanding of the universe.
Screenshots
Verdict
The clearest difference is review sentiment: xSky at 79% against Hubble Space Telescope Tracker's 0%. xSky also leads on rating (4.3 vs 1.0) and in-app purchases (none vs 1). Hubble Space Telescope Tracker's advantage is iOS requirement (12.0 vs 16.0). On price, update cadence and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Hubble Space Telescope Tracker sells 1 one-off in-app purchase. xSky asks for nothing beyond the download.
xSky holds the better App Store score, 4.3 against 1.0. That said, the two scores are not equally well evidenced: xSky has 80 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 79% of xSky's written reviews are positive against 0% of Hubble Space Telescope Tracker's.
Both ship on a similar rhythm, roughly every 3 months. Both last shipped on November 1, 2026.
| Parameter | xSky | Hubble Space Telescope Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (80 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 79.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 80 — better | 2 |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 60 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | Oleg Sur | KAKHA GIORGASHVILI |
Customer experience
xSky
Hubble Space Telescope Tracker
Bugs and requests
xSky
Reported bugs
9 issues- App keeps crashing
- Location services not working/picking a country
- App closes immediately upon opening
- App is glitchy and moves by itself
- Search button not working in horizontal position
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- App not working on iPhone 12
- App out of sync with reality
- Sun located incorrectly at noon
- Mercury in retrograde causing app to not open
Requested features
9 requests- Camera feature for high-quality photos
- Ability to turn down exposure for photos
- Facts read aloud about celestial objects
- Traditional constellation names (e.g., Virgo, Taurus)
- Show International Space Station or other satellites
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- Option to turn off constellation lines
- Improve search button size and usability
- Fix search button in horizontal mode
- More mythological graphics and information about stars
Hubble Space Telescope Tracker
Not enough reviews yet to summarise bugs or requests.
In-app purchases
xSky
No in-app purchases
Hubble Space Telescope Tracker
- Premium$2.99
Questions
Is xSky free?
Is Hubble Space Telescope Tracker free?
Which has better reviews, xSky or Hubble Space Telescope Tracker?
Do xSky or Hubble Space Telescope Tracker have ads?
Which is updated more often, xSky or Hubble Space Telescope Tracker?
Other comparisons
