Comparison

Singularity by Vaonis vs Sideris

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

Head to head
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.

About

Sideris

Read full description

Point your camera at the night sky and know exactly what you captured. Sideris is a plate-solving companion and interactive star map built for astrophotographers with simple gear: a camera, a lens, and a star tracker. No go-to mount required. Take a photo of the sky and Sideris solves it: it identifies the exact patch of sky in the frame and reports where the camera is pointing, in real celestial coordinates. The photograph is then overlaid on the star map, at the right angle and the right size, among the stars and deep-sky objects that surround it. STAR MAP AND PLATE SOLVING - Interactive star map: pan and zoom across a live map of stars, planets, and the Moon. - Messier catalog: all 110 Messier objects, each with a real NASA and ESA photograph and an altitude curve showing when it climbs highest and when the sky is dark enough to shoot it. - Plate solving: identify any night-sky photo and get its true celestial coordinates. - Photo on the sky map: the solved picture appears exactly where it points, with the surrounding sky in view. - Distance to target: pick the object you were aiming for and see how far the center of the frame sits from it. TOOLS FOR THE FIELD - Polar alignment scope: a built-in reticle for aligning your star tracker. - Night mode: a red-light theme that turns on automatically after dark and preserves night vision. - White screen: a dimmable white panel for shooting flat frames. - Moon phase calendar: phases, illumination and moonrise times for any night, whether the Moon is the problem or the subject. NO TELESCOPE REQUIRED Solving works fully offline. No signal needed at your dark site. Sideris is built for the DSLR and tracker setup that most beginning and traveling astrophotographers use, without a go-to mount or an observatory. TRY IT FREE Start with free plate solves to try it out. When you are ready for more, unlock unlimited solving with a single one-time purchase. No subscription, ever. Clear skies.

Screenshots

Singularity by Vaonis4 screens
Sideris4 screens

Verdict

The call

The clearest difference is in-app purchases: Singularity by Vaonis at none against Sideris's 1. Sideris's advantage is update cadence (every 10 days vs every 5 weeks). On price, ads, device support and iOS requirement 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. Sideris sells 1 one-off in-app purchase. Singularity by Vaonis asks for nothing beyond the download.

UpkeepUpdate frequency

Singularity by Vaonis ships an update every 5 weeks, Sideris every 10 days. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 8 level
Singularity by Vaonis versus Sideris: the parameters behind the verdict, then further details
ParameterSingularity by VaonisSideris
PriceFreeFree
Rating4.1 (74 ratings) — better—
Positive reviews64.4% of reviews—
Number of ratings74 — better—
Update frequencyEvery 5 weeksEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size401 MB127 MB
Age rating4+4+
DeveloperVaonisLoris BERT

In-app purchases

None

Singularity by Vaonis

No in-app purchases

1 purchases

Sideris

One-time1
  • Unlimited Plate Solving$9.99

Questions

Is Singularity by Vaonis free?
Singularity by Vaonis is free to download, with no in-app purchases.
Is Sideris free?
Sideris is free to download, with in-app purchases available.
Do Singularity by Vaonis or Sideris have ads?
Neither Singularity by Vaonis nor Sideris shows ads.
Which is updated more often, Singularity by Vaonis or Sideris?
Singularity by Vaonis ships an update every 5 weeks, and Sideris every 10 days. Most recently, Singularity by Vaonis was updated on October 14, 2026 and Sideris on October 9, 2026.

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