Comparison

Merge Planets vs Gravity OB1

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

Head to head
About

Merge Planets

Merge identical planets by dragging and dropping them to create the next planet in sequence. Progress through the solar system from Pluto to the Sun, aiming for the highest score in this relaxing puzzle game.

Highlights
  • Drag and merge identical planets
  • Progressive solar system journey
  • Clear objective to reach the Sun
  • Relaxing visuals and ambient sound
  • Automatic progress saving
  • Offline play
Features
Read full description

Ready for a cosmic 3D watermelon-style puzzle adventure? Merge Planets is a captivating, physics-based space puzzle game inspired by the watermelon game mechanics. Instead of dropping fruits, guide and drop celestial bodies into the cosmic arena in full 3D. Match identical planets to merge and evolve them—from tiny Pluto all the way up to the giant, glowing Sun! How to Play: 1. Tap and drag to guide the planet to the position you want to drop it in the 3D space. 2. Release to drop! Merge two identical planets to evolve them into a larger celestial body. 3. Keep an eye on the red danger line; don't let your planets stack up to the top! 4. Reach the ultimate Sun and score as high as possible. Key Features: - 3D Watermelon Game Mechanics: A fresh, dimensional space twist on the classic merge matching mechanics with beautiful planetary orbits. - Realistic Physics Simulation: Fluid collision physics and gravity make every planet bounce, roll, and merge feel incredibly satisfying. - Stunning Space Aesthetics: Rich planet textures, realistic atmospheres, and custom glowing elements create a premium, photorealistic space design. - Global Leaderboards: Compete with players worldwide, track your rank, and share your score dynamically with friends. - Immersive Audio & Animation: Enjoy relaxing soundtracks, cosmic sound effects, and smooth micro-animations during gameplay. - Play Offline: No internet connection? No problem! Play wherever and whenever you want. Plan your drops, find the perfect angles, and conquer the universe. Download Merge Planets now and start your space journey!

About

Gravity OB1

Features
Read full description

GRAVITY OB1 turns orbital physics into pure arcade thrill. Sling your ship across a living solar system, ride the pull of planets and black holes, and master gravity itself — because the radar is your only map. THREE GAMES IN ONE - CRUISE — Pure flight. No weapons, no boosters. Just you, gravity, and one perfect slingshot to the target. - COMBAT — Full war. Dodge mines, missiles, and asteroid lasers. Boosters and shields at your side. - ASSAULT — Take the fight to the enemy. Dogfight alien ships with a twin-stick control scheme, lock into orbit around planets, and rain fire on your foes. MASTER GRAVITY Every shot is a puzzle. Planets bend your flight path, black holes swallow the careless, and the sun is always hungry. Learn to read the pull, thread the needle, and let physics carry you home. ORBIT LOCK Fly close to any planet and lock into a stable orbit — circle your target hands-free while your cannons and homing missiles pour fire into it. A gravity-powered gunship run like nothing else on mobile. A FLEET OF SHIPS Unlock 8 distinct ships, from the nimble Needle interceptor to the mighty Bastion battleship. Each flies differently — light and fast, or heavy and armored but harder to pull free of gravity's grip. 100 MISSIONS + SUPER NOVA Ten levels across every mode, each with escalating hazards: moving asteroids, black holes, orbiting worlds, and finally the endless waves of Super Nova. FEATURES - Real gravity physics — no two shots ever feel the same - Three completely different game modes - 8 unlockable ships with unique handling - 8 alien enemy types with distinct behaviors - Homing missiles, cannons, boosters, and shields - A tactical radar you'll learn to live by - Premium hand-crafted art and an original soundtrack Free to play the opening of every mode. Unlock the full campaign once — yours forever. Slingshot in. Master the pull. Clear the system.

Screenshots

Merge Planets4 screens
Gravity OB14 screens

Verdict

The call

The clearest difference is in-app purchases: Merge Planets at none against Gravity OB1's 1. Gravity OB1's advantage is iOS requirement (13.4 vs 15.6). On price, update cadence, ads and 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Gravity OB1 sells 1 one-off in-app purchase. Merge Planets asks for nothing beyond the download.

UpkeepUpdate frequency

Merge Planets ships an update every 6 days, Gravity OB1 every 5 days. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

Scorecard2 real differences · 8 level
Merge Planets versus Gravity OB1: the parameters behind the verdict, then further details
ParameterMerge PlanetsGravity OB1
PriceFreeFree
Rating4.8 (6 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings6 — better—
Update frequencyEvery 6 daysEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.613.4 — better
Further details — not scored
Size120 MB25 MB
Age rating4+4+
DeveloperAykut YILDIRIMQ8blog

In-app purchases

None

Merge Planets

No in-app purchases

1 purchases

Gravity OB1

One-time1
  • Unlock Full Game$3.99

Questions

Is Merge Planets free?
Merge Planets is free to download, with no in-app purchases.
Is Gravity OB1 free?
Gravity OB1 is free to download, with in-app purchases available.
Do Merge Planets or Gravity OB1 have ads?
Neither Merge Planets nor Gravity OB1 shows ads.
Which is updated more often, Merge Planets or Gravity OB1?
Merge Planets ships an update every 6 days, and Gravity OB1 every 5 days. Most recently, Merge Planets was updated on October 7, 2026 and Gravity OB1 on October 14, 2026.

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