Planet Gravity vs OOH
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Planet Gravity
Engage in a physics-based game simulating asteroid flight and solar system creation. Complete missions to explore the universe and pass the time. Discover other titles for freeform universe building.
- Physics-based gameplay
- Asteroid simulation
- Solar system creation
- Level-based missions
- Universe exploration
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"Planet Gravity" is a physical base game. We simulate asteroids flying over space. And create the solar system step by step. On each level, we will have some missions for you to finished. The goal of this game is increase your interesting on universe and helping you to the pass the time. And if you want to create the universe on your own freely, we have two games suggested to you. Find "myDream Universe" or "Sandbox Planet" on Appstore.
OOH
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魔术师拿出手机展示黑洞，结果还可以把硬币放进里面...
Screenshots
Verdict
The clearest difference is price: OOH at Free against Planet Gravity's $11.00. OOH also leads on in-app purchases (none vs 1) and ads (none vs shown). On 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
OOH is free to download; Planet Gravity costs $11.00 up front. Planet Gravity sells 1 one-off in-app purchase. OOH asks for nothing beyond the download.
Planet Gravity ships an update every 4 months, OOH fortnightly. The most recent releases landed on September 23, 2026 and September 13, 2026 respectively.
| Parameter | Planet Gravity | OOH |
|---|---|---|
| Price | $11.00 | Free — better |
| Rating | 4.2 (54 ratings) — better | — |
| Positive reviews | 44.1% of reviews | — |
| Number of ratings | 54 — better | — |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 108 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Oscar Tsang | 家回 罗 |
In-app purchases
Planet Gravity
- Golden Pass$2.99
OOH
No in-app purchases
