Comparison

Z vs Planet Gravity Drop

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

Head to head
About

Z

Engage in thrilling zombie combat and upgrade your powerful Z-Machine. Battle through hordes of undead enemies to survive and conquer the apocalypse.

Highlights
  • Zombie combat
  • Vehicle upgrades
  • Horde survival
  • Apocalypse battles
Features
Read full description

Upgrade your Z-Machine! Defeat the Hordes of Zombies!

About

Planet Gravity Drop

Features
Read full description

Welcome to Planet Gravity Drop – The Ultimate Endless Space Runner & Planet Learning Adventure! Are you ready to embark on an out-of-this-world journey through the cosmos? Planet Gravity Drop combines endless runner gameplay with a fun, interactive way to explore space science. Whether you’re dodging asteroids or diving deep into planetary facts, this game is your gateway to the stars. - GAME FEATURES - - Endless Runner Gameplay Guide your planet-ball through deep space in an infinite descent! Avoid asteroids, satellites, and space debris as you plunge into the void. Collect glowing stars to unlock new planets, upgrades, and power-ups. - Real Planets, Real Stats – Learn While You Play! Take control of real planets from our solar system—Mercury to Neptune, and beyond. Each planet has authentic physical stats: speed, gravity, control, and durability. - Packed with fascinating facts and comparisons, every planet includes educational content tailored for curious players. Understand what makes each world unique and how they relate to Earth. - Deep Space Education – Not Just Planets! Go beyond planets: - Learn about the Moon landings, Apollo missions, and Mars rover expeditions like Curiosity and Perseverance. - Discover how humanity has explored space and what we’ve found on our neighboring celestial bodies. All this scientific content is seamlessly integrated into the gameplay—so you’re learning while having fun! - Stunning 3D Graphics Enjoy beautifully crafted planetary models and vivid, modern space visuals. Smooth animations and an immersive UI make exploring the universe a visual treat. - Collect, Unlock, Upgrade Earn stars to unlock new planets, each with different mechanics and educational tidbits. Every planet offers a fresh way to play—and new knowledge to gain! - Fun & Educational for All Ages Perfect for kids, teens, and adults who love space, science, and gaming. Whether you're a student, a teacher, or a space enthusiast, Planet Gravity Drop turns learning into an exciting game. - Easy to Play, Hard to Master Intuitive controls make it accessible to anyone, but skill and knowledge lead to higher scores and deeper discovery. -- Why You’ll Love Planet Gravity Drop -- - A perfect blend of casual fun and serious science. - Great for quick gaming bursts or extended space adventures. - Learn real astronomy, physics, and space history—Moon missions, Mars rovers, and more! - Discover how planets compare and what makes our solar system so extraordinary. - Download Planet Gravity Drop now and dive into the most fun way to explore our universe. How far can you fall? What will you learn next? The stars are calling—start your cosmic journey today!

Screenshots

Z4 screens
Planet Gravity Drop4 screens

Verdict

The call

The clearest difference is ads: Planet Gravity Drop at none against Z's shown. Z's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases 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. Z sells 4 one-off in-app purchases and Planet Gravity Drop sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Z ships an update fortnightly, Planet Gravity Drop every 2 weeks. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
Z versus Planet Gravity Drop: the parameters behind the verdict, then further details
ParameterZPlanet Gravity Drop
PriceFreeFree
Rating3.3 (306 ratings) — better—
Positive reviews34.9% of reviews—
Number of ratings306 — better—
Update frequencyFortnightly — betterEvery 2 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size277 MB301 MB
Age rating9+12+
DeveloperYso CorpManuel Graca

Bugs and requests

Z

Reported bugs

3 issues
  • Game crashing or freezing
  • Inability to progress past certain levels
  • Paid features not functioning correctly

Requested features

3 requests
  • More levels and worlds to explore
  • Ability to disable ads permanently
  • Improved performance and stability

Planet Gravity Drop

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Z

One-time4
  • Character Pack$2.99
  • Remove ads$2.99
  • Vehicule Pack$2.99
Show 1 more
  • Starter Pack$3.99
1 purchases

Planet Gravity Drop

One-time1
  • Remove Ads$5.99

Questions

Is Z free?
Z is free to download, with in-app purchases available.
Is Planet Gravity Drop free?
Planet Gravity Drop is free to download, with in-app purchases available.
Do Z or Planet Gravity Drop have ads?
Z shows ads; Planet Gravity Drop does not.
Which is updated more often, Z or Planet Gravity Drop?
Z ships an update fortnightly, and Planet Gravity Drop every 2 weeks. Most recently, Z was updated on October 19, 2026 and Planet Gravity Drop on October 7, 2026.

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