Comparison

CelestialGuide vs Hubble

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

Head to head
About

CelestialGuide

Explore the cosmos with an interactive sky map that displays stars, planets, and celestial events. Point your device at the sky to see a real-time representation of your surroundings, with adjustable visibility settings for stars.

Highlights
  • Interactive sky map
  • Real-time celestial tracking
  • Adjustable star visibility
  • Planet and comet locations
  • Eclipse and transit rendering
  • Messier Object database
  • Virtual Orrery
Features
Read full description

Celestial Guide is an interactive database of information about stars and planets. Its basic interface is a map of the sky as seen from any point on Earth at any point in time. The user can manually choose the time and location, or the iPhone's or iPad's GPS and clock can be used to select the current time and location. If the device is pointed at the sky, the map on the screen will be presented corresponding to the actual view in that direction. The star database includes stars brighter than magnitude 9. The user can select the minimum visible magnitude, which allows the map to conform to the stars which are visible to the user based on local viewing conditions. CelestialGuide presents accurate locations of planets and comets, including rendering of eclipses, transits and occultations that are visible from the selected location. CelestialGuide also has a database of Messier Objects. CelestialGuide also includes a Virtual Orrery, displaying the relative position of the planets and comets at any point in time.

About

Hubble

Features
Read full description

With the "Hubble: Deep Space PRO" application, our aim is to provide you with the information obtained from current researches about 'the Universe' in a compact way. Here you will find many fascinating images, some of which you will want to examine in detail and some you will want to read in detail. You will have a nice user experience and obtain detailed information while navigating through the beautiful photos taken by Hubble Space Telescope. FEATURES • In the "Browse" section, you will be able to quickly browse through hundreds of photos (550+) and also read detailed information about them. • In the "SlideShow" section, you will be able to browse through hundreds of impressive photos in full screen size and feel as if you were in the orbit at that moment. If you wish, you will be able to get detailed information about these impressive sights by tapping the Info button. • In the "Gallery" section, you will be able to see all the photos impressively, show what you want in full screen and when you want to examine them in detail, you can zoom in with the help of your fingers. • For those who do not want to be contented with just beautiful photos, there are many videos (220+) in the "Videos" section. • You will get detailed information about "Deep Space Objects", • You will also find three-dimensional models in the "3D" section.

Screenshots

CelestialGuide4 screens
Hubble4 screens

Verdict

The call

The clearest difference is iOS requirement: Hubble at 15.6 against CelestialGuide's 18.0. On price, update cadence, ads and in-app purchases 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

CelestialGuide costs $0.99 and Hubble $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CelestialGuide ships an update every 17 months, Hubble every 9 months. The most recent releases landed on June 10, 2026 and September 13, 2026 respectively.

Scorecard1 real difference · 9 level
CelestialGuide versus Hubble: the parameters behind the verdict, then further details
ParameterCelestialGuideHubble
Price$0.99$0.99
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 17 monthsEvery 9 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.6 — better
Further details — not scored
Size17 MB1.7 GB
Age rating4+9+
DeveloperGeoffrey DommAlparslan Topbas

In-app purchases

None

CelestialGuide

No in-app purchases

None

Hubble

No in-app purchases

Questions

Is CelestialGuide free?
CelestialGuide costs $0.99, with no in-app purchases.
Is Hubble free?
Hubble costs $0.99, with no in-app purchases.
Do CelestialGuide or Hubble have ads?
Neither CelestialGuide nor Hubble shows ads.
Which is updated more often, CelestialGuide or Hubble?
CelestialGuide ships an update every 17 months, and Hubble every 9 months. Most recently, CelestialGuide was updated on June 10, 2026 and Hubble on September 13, 2026.

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