Comparison

Rocket Protector vs Gravity Derby

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Planet rotation via swipe
  • Rocket launching by tap
  • Asteroid destruction
  • Missile upgrades
  • Reaction and accuracy testing
Read full description

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.

About

Gravity Derby

Features
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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

Rocket Protector4 screens
Gravity Derby4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ScorecardNo meaningful differences
Rocket Protector versus Gravity Derby: the parameters behind the verdict, then further details
ParameterRocket ProtectorGravity Derby
PriceFreeFree
Rating3.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 24 months—
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size42 MB774 MB
Age rating4+4+
DeveloperALEXEY KOZLOV云飞 徐

In-app purchases

3 purchases

Rocket Protector

One-time3
  • Remove Ads$0.99
  • 100 mineral$0.99
  • 500 mineral$1.99
1 purchases

Gravity Derby

One-time1
  • 100 Skin Coins$0.99

Questions

Is Rocket Protector free?
Rocket Protector is free to download, with in-app purchases available.
Is Gravity Derby free?
Gravity Derby is free to download, with in-app purchases available.
Do Rocket Protector or Gravity Derby have ads?
Both Rocket Protector and Gravity Derby show ads.

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