Planet Gravity vs Sandbox Planet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Planet Gravity
Explore the gravitational pull of different celestial bodies. Watch pendulums swing and collide under varying gravitational forces, offering a unique physics simulation experience.
- Select different planets for unique gravity
- Observe pendulum collisions
- Physics-based simulation
- Educational planet facts
- Interactive entertainment
Read full descriptionHide full description
Planet Gravity isn't just about gravity anymore. Select a planet to get a scrolling fact about that planet on the display. This app is a twist on the Newton’s cradle balance balls. The pendulum balls collide just like the real set and you can select other planets to use that planet’s gravity. How does the pendulum swing with different gravity? Even the Sun has gravity - see what it does to the motion of the pendulums (well they'd probably melt but you get the idea.....)
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
Read full descriptionHide full description
Simulate real solar system Emulate universe develop, build any planet you want. Highly customizable, bulid your own solar system.
Screenshots
Verdict
The clearest difference is price: Planet Gravity at Free against Sandbox Planet's $14.99. Planet Gravity also leads on in-app purchases (none vs 6) and ads (none vs shown). Sandbox Planet's advantage is review sentiment (53% vs 25%) and update cadence (every 3 months vs every 14 months). On 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
Planet Gravity is free to download; Sandbox Planet costs $14.99 up front. Sandbox Planet sells 6 one-off in-app purchases. Planet Gravity asks for nothing beyond the download.
Planet Gravity ships an update every 14 months, Sandbox Planet every 3 months. The most recent releases landed on June 7, 2026 and September 21, 2026 respectively.
| Parameter | Planet Gravity | Sandbox Planet |
|---|---|---|
| Price | Free — better | $14.99 |
| Rating | — | 4.5 (300 ratings) — better |
| Positive reviews | 25.0% of reviews | 52.5% of reviews — better |
| Number of ratings | — | 300 — better |
| Update frequency | Every 14 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 17.6 | 16.6 — better |
| Further details — not scored | ||
| Size | 5 MB | 118 MB |
| Age rating | 4+ | 4+ |
| Developer | Niagara Mobile LLC | Oscar Tsang |
Customer experience
Planet Gravity
Sandbox Planet
Bugs and requests
Planet Gravity
Not enough reviews yet to summarise bugs or 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
Show 3 moreShow fewer
- 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
Show 2 moreShow fewer
- Add more slots for creations
- Provide instructions or tutorials
In-app purchases
Planet Gravity
No in-app purchases
Sandbox Planet
- 5000 GP$1.99
- Remove Ad$2.99
- 25000 GP$5.99
Show 3 moreShow fewer
- 50000 GP$9.99
- 120000 GP$19.99
- 200000 GP$29.99
Questions
Is Planet Gravity free?
Is Sandbox Planet free?
Do Planet Gravity or Sandbox Planet have ads?
Which is updated more often, Planet Gravity or Sandbox Planet?
Other comparisons
