Gravity! vs Hubble
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gravity!
Simulate the forces of gravity by flinging particles and observing their interactions. Create celestial bodies like planets and black holes, and customize their properties. Explore vast cosmic simulations with intuitive zoom and pan controls.
- Gravity simulation
- Particle interaction
- Create solar systems
- Add black holes
- Adjust particle properties
- Zoom and pan controls
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This app simulates the effects of gravity. You can fling particles at each other and watch them interact. Create solar systems and galaxies! Make a planet and fling asteroids into it! Add a black hole and watch everything get sucked in! You can adjust the size, mass, and color of the particles! Zoom in and out and look around with two fingers! App Preview Music: "Mesmerizing Galaxy " Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 4.0 License http://creativecommons.org/licenses/by/4.0/
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 review sentiment: Gravity! at 74% against Hubble's 0%. Gravity! also leads on rating (4.0 vs 3.0) and ads (none vs shown). Hubble's advantage is iOS requirement (13.0 vs 15.6). On price, in-app purchases, monetization model and device support 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. Gravity! sells 1 one-off in-app purchase and Hubble sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Gravity! holds the better App Store score, 4.0 against 3.0. That said, the two scores are not equally well evidenced: Gravity! has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 74% of Gravity!'s written reviews are positive against 0% of Hubble's.
Gravity! ships an update every 2 months, Hubble every 23 months. The most recent releases landed on November 13, 2026 and November 3, 2026 respectively.
| Parameter | Gravity! | Hubble |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (19 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 73.5% of reviews — better | 0.0% of reviews |
| Number of ratings | 19 — better | 2 |
| Update frequency | Every 2 months — better | Every 23 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 1.7 GB |
| Age rating | 4+ | 9+ |
| Developer | Marc Davis | Alparslan Topbas |
Customer experience
Gravity!
Hubble
In-app purchases
Gravity!
- Gravity! Extended Edition$0.99
Hubble
- Hubble: Deep Space 2 - Ad-Free$0.99
