Comparison

Celestron SkyPortal vs Singularity by Vaonis

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Celestron SkyPortal

Explore the cosmos with a comprehensive astronomy suite. Discover stars, planets, and celestial events, and enhance your stargazing with detailed information and audio narration. Connect to compatible telescopes for automatic object location.

Highlights
  • Explore 120,000 stars and celestial objects
  • Simulate night sky past/future
  • Real-time sky synchronization
  • Control compatible WiFi telescopes
  • Animate celestial events
  • Audio narration and object descriptions
  • Night Vision mode
Features
Read full description

Celestron’s newest planetarium app is an astronomy suite that redefines how you experience the night sky. Explore the Solar System, 120,000 stars, over 200 star clusters, nebulae, galaxies, and dozens of asteroids, comets, and satellites—including the ISS. SkyPortal includes everything you need to experience the night sky in an exciting new way. When connected to a compatible Celestron WiFi telescope, you can automatically point the telescope to any object in the database and view it with great detail. Planetarium Features Simulate the night sky and plan your observing session with a custom list of tonight’s best objects based on your exact time and location. Look ahead to see when Jupiter’s Great Red Spot will be visible, animate transits, eclipses, and other celestial events. View hundreds of photos or listen to more than four hours of audio narration to enhance your stargazing experience. •Simulate the night sky from anywhere on planet Earth, up to 100 years in the past or future. •Compass Mode (with compatible devices): Hold your device up to the sky for a real-time synchronized display of celestial objects – from star names, constellations, planets, to nebulae and galaxies. •Control compatible Celestron WiFi telescopes with sophisticated mount modeling for quick and accurate go-to alignment. •Animate transits, conjunctions, eclipses, and other events with SkyPortal's Time controls. •Explore the sky with Night Vision turned on, and preserve your eyesight after dark. •Learn the history, mythology, and science of the heavens with SkyPortal's hundreds of object descriptions. •Browse hundreds of astronomical photographs and NASA spacecraft images •Access over 4 hours of audio commentary to guide you through the best celestial objects. Computerized Telescope Control Pair your device to your compatible Celestron WiFi telescope, align with Celestron’s patented SkyAlign™ technology, and you’re ready to explore! Identify objects instantly. Tap any object and your telescope automatically centers it in the eyepiece. SkyPortal’s telescope alignment incorporates advanced mount modeling, providing better pointing accuracy than other telescope systems which rely on a dedicated computer.

About

Singularity by Vaonis

Control your smart telescope to explore the cosmos. Discover celestial objects with personalized recommendations, capture stunning images of galaxies and nebulae, and share your astronomical journey.

Highlights
  • Automatic setup and alignment
  • Real-time image processing
  • Object catalog and coordinate pointing
  • Mosaic mode for wider views
  • Solar observation mode
  • Expert mode for advanced control
  • Night planning and automated exploration
Read full description

Singularity by Vaonis is the control center for your Stellina and Vespera observation stations. This intuitive mobile application allows you to explore the Cosmos with ease. Receive personalized recommendations on which objects to observe according to your geolocation and the astronomical calendar. Learn more about the history of the Universe and immortalize your trip by photographing galaxies, nebulae and star clusters. AUTOMATIC SETUP Just press the button, and let Stellina and Vespera do the rest. Your new companion will use your GPS to find its position on Earth, adjust its focus and be ready to take you anywhere you want in less than 5 minutes. AUTOMATIC ALIGNEMENT AND TRACKING Choose your destination in the Singularity object catalog or enter the celestial coordinates of the object. Your station will automatically point to the selected area, and track it to maintain optimal viewing conditions. IMAGE PROCESSING It only takes a few seconds for Stellina and Vespera to deliver the first image of your destination before compiling dozens, hundreds or even thousands of other images in real time, progressively revealing ever greater details and colors. SPACE CENTER Take control of your station from the Space Center: prepare your observation evening by checking the weather forecast, create and manage your observation locations, check the parameters of Stellina/Vespera... You can also read the astronomical news or our advice on Stellina and Vespera on our blog while waiting for nightfall. MOSAIC MODE CovalENS is the first automated “panorama mode” ever embedded into a telescope. This unique patented technology, developed by Vaonis, allows you to take several photos of a same stellar region and then automatically stitch them together, thus offering users a larger view (field) of the universe. SOLAR MODE Observe easily and safely the closest star to Earth during the day with the Vaonis solar filters. The Solar Mode allows you to observe and capture sunspots that show the intensity of the Sun’s activity. EXPERT MODE Access an unlimited number of objects with coordinate pointing. Customize your camera's exposure time and gain to generate initial files for manual processing using image editing software. PLAN MY NIGHT Program your observation station for the night and let it explore the Universe on its own. After a good night's sleep, recover your photos on a USB key (Stellina) or via Wi-FI FTP protocol (Vespera). SHARE YOUR JOURNEY ON SOCIAL NETWORKS Your trip is over, share it! Show the world your photos on social networks and join our community of explorers, using the hashtags #myStellina or #myVespera.

Screenshots

Celestron SkyPortal4 screens
Singularity by Vaonis4 screens

Verdict

The call

The clearest difference is rating: Singularity by Vaonis at 4.2 against Celestron SkyPortal's 3.6. Singularity by Vaonis also leads on review sentiment (64% vs 32%) and update cadence (every 5 weeks vs every 3 months). Celestron SkyPortal's advantage is ratings volume (354 vs 75). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Singularity by Vaonis holds the better App Store score, 4.2 against 3.6. Both are backed by a comparable volume of ratings — 354 and 75 respectively. Written reviews point the same way: 32% of Celestron SkyPortal's written reviews are positive against 64% of Singularity by Vaonis's.

UpkeepUpdate frequency

Celestron SkyPortal ships an update every 3 months, Singularity by Vaonis every 5 weeks. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Celestron SkyPortal versus Singularity by Vaonis: the parameters behind the verdict, then further details
ParameterCelestron SkyPortalSingularity by Vaonis
PriceFreeFree
Rating3.6 (354 ratings)4.2 (75 ratings) — better
Positive reviews31.9% of reviews64.4% of reviews — better
Number of ratings354 — better75
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.614.0 — better
Further details — not scored
Size709 MB401 MB
Age rating4+4+
DeveloperCelestron, LLCVaonis

Customer experience

Celestron SkyPortal

All ratings354 ratings
Positive62.7%
Neutral11.9%
Negative25.4%
Written reviews188 reviews
Positive31.9%
Neutral17.0%
Negative51.1%

Singularity by Vaonis

All ratings74 ratings
Positive77.0%
Neutral6.8%
Negative16.2%
Written reviews45 reviews
Positive64.4%
Neutral8.9%
Negative26.7%

User reviews

Celestron SkyPortal

From 354 App Store ratings

What we love

  • 👍 Great app
  • 🚀 Transforms stargazing
  • 💡 Wonderful features
  • 👍 Convenient control
  • 👍 Incredible for free

Room to improve

  • 🐛 Alignment issues
  • 🐛 Connectivity problems
  • 🐛 Laggy controls
  • 🐛 Inaccurate compass
  • 🐛 Crashes and freezes

Singularity by Vaonis

From 75 App Store ratings

What we love

  • 👍 Easy to use and set up
  • 🌟 Stunning photo quality
  • ✨ Magical viewing experience
  • 🚀 Smooth operation
  • ✅ Well-designed interface

Room to improve

  • 👎 No landscape mode for iPad/iPhone
  • 😠 Forced app updates
  • 🌐 Too American-centric
  • 📉 Blurred catalog images
  • ⚠️ Quality control issues

Bugs and requests

Celestron SkyPortal

Reported bugs

6 issues
  • Fails to align telescope
  • Telescope points in wrong direction
  • Disconnects frequently
  • Doesn't show deep sky objects
  • Crashes on startup
Show 1 more
  • Incompatible with iOS 14

Requested features

7 requests
  • Add red night mode
  • Improve focus motor control
  • Integrate weather data
  • Provide RA/DEC coordinates
  • Add more celestial objects
Show 2 more
  • Improve video streaming
  • Enhance user interface

Singularity by Vaonis

Reported bugs

7 issues
  • Crashing constantly
  • Solar images turned green
  • Moon pictures are broken
  • App crashes telescope
  • Keeps losing connection to iPad
Show 2 more
  • Software crashes all the time
  • No internet connection error

Requested features

17 requests
  • Add landscape mode for iPad and iPhone
  • Add a sky map to the app
  • Allow planning of multi-night observations
  • Enable manual control of the observation arm
  • Add iOS widgets
Show 12 more
  • Allow running on M-chip MacBooks
  • Add in-app post-processing or restacking
  • Enable stacking over different nights
  • Add ASCOM compatible drivers
  • Support for Vision Pro
  • Add file transfer over USB
  • Add manual mode for the moon
  • Improve catalog image quality
  • Add Italian language support
  • Enable planning for new scopes
  • Add access point to home network
  • Add Spanish language support

In-app purchases

None

Celestron SkyPortal

No in-app purchases

None

Singularity by Vaonis

No in-app purchases

Questions

Is Celestron SkyPortal free?
Celestron SkyPortal is free to download, with no in-app purchases.
Is Singularity by Vaonis free?
Singularity by Vaonis is free to download, with no in-app purchases.
Which has better reviews, Celestron SkyPortal or Singularity by Vaonis?
Singularity by Vaonis is rated higher. Celestron SkyPortal averages 3.6 out of 5 from 354 ratings, while Singularity by Vaonis averages 4.2 from 75 ratings.
Do Celestron SkyPortal or Singularity by Vaonis have ads?
Neither Celestron SkyPortal nor Singularity by Vaonis shows ads.
Which is updated more often, Celestron SkyPortal or Singularity by Vaonis?
Celestron SkyPortal ships an update every 3 months, and Singularity by Vaonis every 5 weeks. Most recently, Celestron SkyPortal was updated on October 26, 2026 and Singularity by Vaonis on October 24, 2026.

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