Rocket Protector vs Gravity Derby
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Rocket Protector
Test your reflexes and precision by defending a planet from incoming asteroids. Launch rockets to destroy threats and upgrade your arsenal to survive longer. The goal is to see how long you can protect your world.
- Planet rotation via swipe
- Rocket launching by tap
- Asteroid destruction
- Missile upgrades
- Reaction and accuracy testing
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Check your reaction and accuracy. Find out how long you can protect the planet from asteroids by launching rockets. Improve the missiles and last longer. Swipe to rotate the planet. Tap to launch the rocket. Destroy everything that approaches the planet.
Gravity Derby
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Experience the thrill of gravity-driven marble racing in this fully offline, physics-based simulation game. Every race is unique—your marble’s material, starting lane, skills and the track’s shape all influence the final outcome. Select the powerful skills and activate them at the right moment, gain speed, outplay rivals then win the race. With multiple bevel track layouts, no two runs are ever the same. Slopes, wave platforms, S-curves, spinning wheels, Tesla-style air valves, and other obstacles create unpredictable momentum changes and exciting moments as marbles collide, overtake, and accelerate toward the finish line. Perfect for players who enjoy physics simulations, strategy, and quick competitions. Simple to pick up, satisfying to master. Features Realistic gravity-based physics simulation Multiple textures and marble material types Varied track designs: slopes, wave floors, S-bends, rotating discs, air-valve boosters, and more Offline play with no internet required Fast races perfect for casual sessions Smooth visuals and satisfying sound effects Test your intuition, learn the physics, and become the ultimate marble racing strategist!
Screenshots
Verdict
Rocket Protector and Gravity Derby are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Rocket Protector sells 3 one-off in-app purchases and Gravity Derby sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Rocket Protector | Gravity Derby |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 24 months | — |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 42 MB | 774 MB |
| Age rating | 4+ | 4+ |
| Developer | ALEXEY KOZLOV | 云飞 徐 |
In-app purchases
Rocket Protector
- Remove Ads$0.99
- 100 mineral$0.99
- 500 mineral$1.99
Gravity Derby
- 100 Skin Coins$0.99
Questions
Is Rocket Protector free?
Is Gravity Derby free?
Do Rocket Protector or Gravity Derby have ads?
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