Comparison

Exoplanet vs xSky

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

Head to head
About

Exoplanet

Explore a vast, interactive database of discovered exoplanets and their host stars. Visualize their physical properties, locations in the night sky, and orbital paths. Discover the observable universe from Earth to the cosmic microwave background with stunning 3D models and augmented reality features.

Highlights
  • Interactive visualizations and animations
  • Daily updated exoplanet and host star properties
  • 3D Milky Way model with exoplanet locations
  • Augmented reality sky map
  • Exoplanet orbit and habitable zone visualizations
  • Data from multiple exoplanet catalogs
Features
Read full description

Exoplanets are planets orbiting stars beyond our own solar system. This app allows you to explore all discovered exoplanets, their measured physical properties, their location in the night sky, and their host stars. An interactive model shows you the entire observable universe, all the way from the surface of the Earth to the cosmic microwave background. This app has been developed by a professional astronomer. Main features: * Interactive visualizations and animations. * Physical properties of all detected exoplanets and their host stars, updated on a daily basis. * Stunning 3D model of our Milky Way showing the location of all known exoplanets. You can zoom into any planetary system, explore how the night sky and the constellations look from the surface of other planets, or zoom out and see other local galaxies and galaxy clusters as well as the cosmic microwave background. * Visualizations of exoplanet orbits and the habitable zone. * Choose between the Open Exoplanet Catalogue, the NASA Exoplanet Archive, and the Extrasolar Planet Encyclopedia (exoplanet.eu). * Push notifications are sent out whenever a new planet is discovered. * Augmented reality sky map: point the phone towards the sky to find an exoplanet! * Interactive multi-touch correlation plots. * Solar System planets, major moons, and asteroids are included. * Explore S-Stars orbiting the black hole at the Galactic Center of our Milky Way * Background information about exoplanets and detection methods. * Full support of planets in binary, triple, quadruple systems and orphan planets. * Real-time ray tracing on the GPU.

About

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.

Highlights
  • 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
Features
Read full description

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.

Screenshots

Exoplanet4 screens
xSky4 screens

Verdict

The call

The clearest difference is rating: Exoplanet at 4.7 against xSky's 4.2. Exoplanet also leads on update cadence (every 2 weeks vs every 3 months) and ratings volume (956 vs 75). xSky's advantage is in-app purchases (none vs 7). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Exoplanet sells 7 one-off in-app purchases. xSky asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Exoplanet holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Exoplanet has 956 ratings behind it against 75, so its average is the more settled of the two. Written reviews point the same way: 91% of Exoplanet's written reviews are positive against 80% of xSky's.

UpkeepUpdate frequency

Exoplanet ships an update every 2 weeks, xSky every 3 months. The most recent releases landed on September 21, 2026 and July 24, 2026 respectively.

Scorecard8 real differences · 2 level
Exoplanet versus xSky: the parameters behind the verdict, then further details
ParameterExoplanetxSky
PriceFreeFree
Rating4.7 (956 ratings) — better4.2 (75 ratings)
Positive reviews91.0% of reviews — better79.7% of reviews
Number of ratings956 — better75
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple TV — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size105 MB60 MB
Age rating4+4+
DeveloperHanno ReinOleg Sur

Customer experience

Exoplanet

All ratings956 ratings
Positive93.0%
Neutral2.0%
Negative5.0%
Written reviews476 reviews
Positive91.0%
Neutral3.2%
Negative5.9%

xSky

All ratings75 ratings
Positive74.7%
Neutral13.3%
Negative12.0%
Written reviews59 reviews
Positive79.7%
Neutral10.2%
Negative10.2%

Bugs and requests

Exoplanet

Reported bugs

2 issues
  • Upgrade purchase issues with Galaxy Clusters and CMB add-on
  • Kepler objects of interest disappearing when switching databases

Requested features

9 requests
  • Add more detailed textures and visuals for exoplanets
  • Ability to view multiple databases simultaneously
  • Option to see planet surfaces and atmospheres
  • Inclusion of dwarf planets in our solar system
  • Ability to zoom in on and explore other galaxies
Show 4 more
  • Addition of black holes, pulsars, and other celestial objects
  • Inclusion of satellite and spacecraft orbits
  • Narration or audio commentary for key discoveries
  • Ability to view the universe from the surface of planets

xSky

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

Exoplanet

One-time7
  • Galaxy Clusters and CMB$0.99
  • Asteroids$0.99
  • Gaia Stars$0.99
Show 4 more
  • S-Stars$0.99
  • Catalogues$0.99
  • Developer Appreciation Coffee$1.99
  • Kepler Add-on$2.99
None

xSky

No in-app purchases

Questions

Is Exoplanet free?
Exoplanet is free to download, with in-app purchases available.
Is xSky free?
xSky is free to download, with no in-app purchases.
Which has better reviews, Exoplanet or xSky?
Exoplanet is rated higher. Exoplanet averages 4.7 out of 5 from 956 ratings, while xSky averages 4.2 from 75 ratings.
Do Exoplanet or xSky have ads?
Neither Exoplanet nor xSky shows ads.
Which is updated more often, Exoplanet or xSky?
Exoplanet ships an update every 2 weeks, and xSky every 3 months. Most recently, Exoplanet was updated on September 21, 2026 and xSky on July 24, 2026.

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