NAPI Gallery vs Hubble
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NAPI Gallery
Explore stunning images and videos from NASA's public API. View the Astronomical Picture of the Day, dating back to 1995, and discover rover images from Spirit, Opportunity, Curiosity, and Perseverance.
- Astronomical Picture of the Day
- Selectable dates for APOD (since 1995)
- Images from four NASA rovers
- Selectable earth-dates for rover images
- View images from inactive rovers
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This app makes use of the publicly available NASA REST API. This app makes it easy to visualize some of the APIs that return image information. The Astronomical Picture of the Day is typically an image but can sometimes be a video. * The date for the Astronomical Picture of the Day can be selected from today all the way back to July 16, 1995. * Four Rovers are covered: Spirit, Opportunity, Curiosity, and Perseverance. * The earth-date can be selected for each rover to view images of that date. * For Rovers that are no longer active, you can still view images since the active dates for the rover are still selectable. Keep an eye on this app as it will continue to be updated with new categories and anything that may have changed. Note: The DEMO_KEY (that's the actual key) can be used but only allows for a limited number of API calls which translates directly into the number of images that can be viewed per hour and per day. You can go to the NASA API site and apply for a free API Key which gives a much greater limit (1000 request per hour). Please take a look at the About page for more information.
Hubble
Explore the universe with stunning images and videos from the Hubble Space Telescope. Discover detailed information about deep space objects and view 3D models. Enjoy an immersive educational experience.
- Browse 550+ high-resolution space photos
- Detailed information on space objects
- Full-screen slideshow mode
- Zoomable image gallery
- 220+ educational videos
- Interactive 3D models
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With the "Hubble: Deep Space 2" 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 rating: NAPI Gallery at 5.0 against Hubble's 3.0. NAPI Gallery also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume, 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
Both are free to download. Hubble sells 1 one-off in-app purchase. NAPI Gallery asks for nothing beyond the download.
NAPI Gallery holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
NAPI Gallery ships an update every 4 months, Hubble every 23 months. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.
| Parameter | NAPI Gallery | Hubble |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 4 months — better | Every 23 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 1.7 GB |
| Age rating | 4+ | 9+ |
| Developer | Mitch Fisher | Alparslan Topbas |
Customer experience
NAPI Gallery
Hubble
In-app purchases
NAPI Gallery
No in-app purchases
Hubble
- Hubble: Deep Space 2 - Ad-Free$0.99









