Moon Tracker vs Celestron StarSense Explorer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Moon Tracker
Track the moon's position and phases with this intuitive app. Explore lunar paths in augmented reality, view detailed data tables, and access a supermoon calendar. The free version offers current location data, while premium unlocks global and historical information.
- Augmented reality lunar path projection
- 2D and 3D moon path visualizations
- Detailed data tables
- Supermoon calendar
- Moonrise and moonset times
- Lunar eclipse information
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Moon Tracker is a modern, easy-to-use moon tracking app with an intuitive and sleek interface, providing access to a comprehensive range of professional functionalities. LUNAR PATH IN AR An augmented reality projection of the moon's position at your current location. MULTIFUNCTIONAL MAP PRESENTATION Extensive 2D and 3D visualizations of the lunar path. DATA TABLES A detailed overview of moon positions, lunar phases, moonrise and moonset times, lunar eclipses, a supermoon calendar, moon age, and illumination. No ads! The free version of the app displays all information about lunar positions for your current time and location only. The paid Premium version provides access to information for any location and any time of the year.
Celestron StarSense Explorer
This app guides you through the night sky using your smartphone and a compatible telescope. It identifies celestial objects and directs your telescope for optimal viewing, making astronomy accessible for beginners and enthusiasts alike.
- Smartphone-guided stargazing
- Real-time telescope positioning
- Sky recognition technology
- Celestial object database
- Tonight's Best observing list
- Detailed object information and audio
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Unleash the power of your smartphone to take you on a guided tour of the night sky, even if you’ve never used a telescope before. STARSENSE SKY RECOGNITION TECHNOLOGY This one-of-a-kind app uses patent-pending technology in combination with a Celestron StarSense Explorer telescope (sold separately) to analyze star patterns overhead to calculate the telescope’s position in real time with pinpoint accuracy. StarSense Explorer’s sky recognition technology has revolutionized the manual telescope by eliminating the confusion common among beginners and enhancing the user experience for even seasoned telescope users. Many would-be astronomers become frustrated or lose interest in their manual telescope because they don’t know where to point it to see planets, star clusters, nebulae, and galaxies—the good stuff! StarSense Explorer tells you exactly which celestial objects are currently visible in the night sky and where to move your telescope to place those objects in the telescope’s eyepiece. THE NIGHT SKY AT YOUR FINGERTIPS The user-friendly planetarium interface allows you to scan the skies for objects you wish to view. You can also search for objects in the extensive database. Not sure what to observe? StarSense Explorer automatically generates a list of all the best stars, planets, galaxies, nebulae and more currently visible from your location. Simply select one from the list and off you go! While you observe, you can access detailed information, images, and audio descriptions for the most popular objects. It’s a great way for the entire family to learn scientific facts, history, mythology, and more, deepening your understanding of the night sky. EASY AS 1-2-3: DOCK, LAUNCH, OBSERVE To get started, assemble your StarSense Explorer telescope and download the app. Your telescope includes a unique unlock code to access the full features of the app. Connect your phone to the telescope by placing it into the StarSense dock and launch the app. After a simple 2-step procedure to align the smartphone’s camera with the telescope, the app displays a view of the night sky and shows a bullseye on the screen to represent the telescope’s current pointing position. From here, you can select an object to view by tapping it in the planetarium view or selecting it from the Tonight’s Best observing list. Objects will vary from night to night; you may see planets like Jupiter or Saturn, nebulae like Orion, the Andromeda Galaxy, or other object types. Once you select an object, the app displays pointing arrows onscreen. These indicate where to move the telescope to find it. Follow the arrows until the bullseye appears centered on target. When the bullseye turns green, the object is visible in the telescope’s lower powered eyepiece. HOW STARSENSE EXPLORER WORKS StarSense Explorer uses image data captured by the smartphone’s camera to determine its pointing position. The app captures an image of the night sky and then matches the star patterns within the image to its internal database in a process like fingerprint matching or facial recognition. The process of extracting star pattern data in images to determine a telescope’s current pointing position is called “plate solving.” It is the same method used by professional observatories and orbiting satellites. The StarSense Explorer app is the first app ever developed that uses plate solving to determine the smartphone’s current pointing position. Other astronomy apps rely on the smartphone’s gyroscopes, accelerometers, and compass to estimate its pointing position. These methods are not accurate enough to place objects within the telescope’s field of view. StarSense Explorer technology is patent-pending. COMPATIBILITY Compatible with iPhone 6 and higher. LOCALIZATION Support for English, Spanish, French, Italian, German, Japanese and Russian.
Screenshots
Verdict
The clearest difference is rating: Moon Tracker at 4.8 against Celestron StarSense Explorer's 3.3. Moon Tracker also leads on review sentiment (69% vs 35%) and device support (3 vs 1). Celestron StarSense Explorer's advantage is in-app purchases (none vs 1) and iOS requirement (18.6 vs 26.0). On price, ratings volume, update cadence and ads 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. Moon Tracker sells 1 one-off in-app purchase. Celestron StarSense Explorer asks for nothing beyond the download.
Moon Tracker holds the better App Store score, 4.8 against 3.3. Both are backed by a comparable volume of ratings — 360 and 167 respectively. Written reviews point the same way: 69% of Moon Tracker's written reviews are positive against 35% of Celestron StarSense Explorer's.
Moon Tracker ships an update monthly, Celestron StarSense Explorer every 2 months. Both last shipped on October 26, 2026.
| Parameter | Moon Tracker | Celestron StarSense Explorer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (360 ratings) — better | 3.3 (167 ratings) |
| Positive reviews | 68.6% of reviews — better | 35.2% of reviews |
| Number of ratings | 360 — better | 167 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Apple Watch — better | iPhone |
| Requires iOS | 26.0 | 18.6 — better |
| Further details — not scored | ||
| Size | 51 MB | 741 MB |
| Age rating | 4+ | 4+ |
| Developer | Zuzana Eskinasi | Celestron, LLC |
Customer experience
Moon Tracker
Celestron StarSense Explorer
User reviews
Moon Tracker
From 360 App Store ratingsWhat we love
- 👍 Great app to track moon
- ✨ Amazing AR feature
- 📍 Accurate moon position
- 💡 Helpful for locating moon
- 🚀 Easy to use
Room to improve
- ⚠️ Premium required for full functionality
- 🐛 Compass calibration error
- 🔄 Asks to buy again / restore purchase issues
- 📍 Location cannot be changed
- ❌ App won't open / crashes on startup
Celestron StarSense Explorer
From 167 App Store ratingsWhat we love
- 🎯 Accurate plate-solving technology for locating celestial objects
- 📚 Comprehensive database with detailed information about objects
- 🎧 Informative audio commentary during observations
- 🔭 Seamless integration with Celestron StarSense telescopes
- 👨🚀 Excellent for beginners to learn astronomy
Room to improve
- 🧭 Persistent compass/directional calibration issues
- 📍 Frequent alignment failures and position detection problems
- 🔄 Requires constant realignment after minor telescope movements
- ❌ Inconsistent accuracy across different iPhone models
- ⏱️ Slow plate-solving on nights with full moon or light pollution
Bugs and requests
Moon Tracker
Reported bugs
6 issues- Compass calibration error
- Date changes to December 5 2023
- Cannot restore purchases
- App crashes on startup
- App won't open
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- Save icon not functioning
Requested features
2 requests- Transparent/clear mode for widget
- iPad version
Celestron StarSense Explorer
Reported bugs
12 issues- Directional orientation reversed or offset by 90+ degrees
- App fails to locate telescope position on clear nights
- Compass defaults to west direction on startup
- Plate-solving fails to recognize sky position
- App crashes when switching between apps or receiving notifications
Show 7 moreShow fewer
- Phone camera not recognized after app backgrounding
- Invalid code errors despite correct code entry
- Code length validation issues (6-character vs 8-character codes)
- Aspect ratio display problems
- App becomes unresponsive during alignment process
- Inconsistent performance across iPhone models (especially iPhone 14, 15)
- Upside-down display when moving telescope side to side
Requested features
9 requests- Multi-language support (Korean, Chinese, Japanese, Portuguese, Arabic, French, Italian, German)
- Observation logging and favorites/bookmarks system
- Support for additional celestial objects (dwarf planets, comets)
- Pan and zoom functionality without moving telescope
- Standalone app functionality without telescope requirement
Show 4 moreShow fewer
- Better arrow indicators for telescope movement guidance
- Support for non-Celestron telescope models
- Improved compass calibration options
- Session notes and observation history tracking
In-app purchases
Moon Tracker
- Premium Version$8.99
Celestron StarSense Explorer
No in-app purchases






