CelestialGuide vs Hubble
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Interactive sky map
- Real-time celestial tracking
- Adjustable star visibility
- Planet and comet locations
- Eclipse and transit rendering
- Messier Object database
- Virtual Orrery
Read full descriptionHide 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.
Hubble
Read full descriptionHide 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
Verdict
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
CelestialGuide costs $0.99 and Hubble $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | CelestialGuide | Hubble |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 17 months | Every 9 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 17 MB | 1.7 GB |
| Age rating | 4+ | 9+ |
| Developer | Geoffrey Domm | Alparslan Topbas |
In-app purchases
CelestialGuide
No in-app purchases
Hubble
No in-app purchases
Questions
Is CelestialGuide free?
Is Hubble free?
Do CelestialGuide or Hubble have ads?
Which is updated more often, CelestialGuide or Hubble?
Other comparisons















