Sandbox Planet vs Gravity Zen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sandbox Planet
Create and customize your own solar systems and planets. Emulate the development of the universe with highly detailed simulation tools. Build any celestial body you can imagine.
- Solar system simulation
- Planet building
- Universe emulation
- Customizable creation
- Celestial body design
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Simulate real solar system Emulate universe develop, build any planet you want. Highly customizable, bulid your own solar system.
Gravity Zen
Observe small circles interacting with a central gravity field. Add numerous boxes to explore how they naturally settle into a stable arrangement. It's a simple yet captivating simulation.
- Gravity field simulation
- Add multiple objects
- Observe stable configurations
- Interactive physics
- Minimalist design
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Watch small circles move around a central gravity field. Add as many boxes as you like. Explore how they find a "stable" configuration by themselves.
Screenshots
Verdict
The clearest difference is price: Sandbox Planet at Free against Gravity Zen's $0.99. Sandbox Planet also leads on ratings volume (304 vs 70). Gravity Zen's advantage is review sentiment (94% vs 52%) and ads (none vs shown). On in-app purchases, 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
Sandbox Planet is free to download; Gravity Zen costs $0.99 up front. Sandbox Planet sells 6 one-off in-app purchases and Gravity Zen sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Gravity Zen holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 304 and 70 respectively. Written reviews point the same way: 52% of Sandbox Planet's written reviews are positive against 94% of Gravity Zen's.
Sandbox Planet ships an update every 3 months, Gravity Zen every 9 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | Sandbox Planet | Gravity Zen |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.5 (304 ratings) | 4.8 (70 ratings) — better |
| Positive reviews | 51.7% of reviews | 93.8% of reviews — better |
| Number of ratings | 304 — better | 70 |
| Update frequency | Every 3 months | Every 9 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 119 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Oscar Tsang | Dominik Hauser |
Customer experience
Sandbox Planet
Gravity Zen
Bugs and requests
Sandbox Planet
Reported bugs
8 issues- Advertisements have non-functional close buttons
- App crashes frequently
- Video ads for currency don't load
- Bug with GP conversion where it decreases
- Daytime interface is too bright
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- Some options do not charge GP as expected
- In-app purchases are confusing
- Black hole physics seem off
Requested features
7 requests- Random planets and stars should spawn
- Add currency earning methods
- Allow naming of planets
- Add more content
- Make the game harder
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- Add more slots for creations
- Provide instructions or tutorials
Gravity Zen
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sandbox Planet
- 5000 GP$1.99
- Remove Ad$2.99
- 25000 GP$5.99
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- 50000 GP$9.99
- 120000 GP$19.99
- 200000 GP$29.99
Gravity Zen
- Small Tip$0.99
- Large tip$2.99
Questions
Is Sandbox Planet free?
Is Gravity Zen free?
Which has better reviews, Sandbox Planet or Gravity Zen?
Do Sandbox Planet or Gravity Zen have ads?
Which is updated more often, Sandbox Planet or Gravity Zen?
Other comparisons
