Comparison

Planet Defense vs Orbital Zero

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

Head to head
About

Planet Defense

Defend your home planet in this roguelike tower defense game. Build and upgrade defenses to fend off alien invaders with strategic gameplay and unique upgrades each playthrough. Master the art of survival in an epic cosmic battle.

Highlights
  • Roguelike progression with randomized upgrades
  • Strategic depth with unlockable sentinels
  • Immersive visuals and sound design
  • Easy to learn, hard to master gameplay
  • Endless replayability with procedural generation
  • Multiple difficulty modes
Features
Read full description

Embark on an interstellar adventure with Planet Defense, a thrilling roguelike tower defense game! Defend your home planet against relentless waves of alien invaders by building, upgrading, and optimizing your defenses. With easy-to-learn mechanics and deep strategic gameplay, every decision counts in your quest for survival. Key Features: Roguelike Progression – Each playthrough is unique, with randomize upgrades and challenges. Adapt your strategy to survive! Strategic Depth – Unlock and upgrade a variety of powerful sentinel, each with unique abilities. Combine them wisely to fend off increasingly tough foes. Immersive Experience – Stunning visuals and atmospheric sound design pull you into an epic cosmic battle for survival. Easy to Learn, Hard to Master – Intuitive controls make it simple to jump in, but mastering the game requires smart planning and quick thinking. Endless Replayability – Procedurally generated levels and multiple difficulty modes ensure no two battles are the same. Defend. Upgrade. Survive. Can you outsmart the alien onslaught and become the ultimate galactic defender? Download now and start your journey! Age Rating 13 Years Above in IGRS: Game content suitable for ages 13 and above (13+)

About

Orbital Zero

Control a gravity-powered saucer, tapping to navigate through space. Avoid obstacles, collect power-ups, and complete missions. Unlock new ships and customize your experience as the challenge increases.

Highlights
  • Gravity-powered saucer control
  • Tap-to-sling gameplay
  • Meteor avoidance
  • Crystal and bonus collection
  • Unlockable ships with abilities
  • Missions across space sectors
  • Progressive difficulty
Features
Read full description

Take control of a gravity-powered saucer and test your timing in Orbital Zero. Tap to sling your ship toward the landing target while avoiding meteors and collecting crystals, shields, and bonuses. Each run becomes progressively faster, challenging you to survive longer and improve your score. FEATURES • Simple tap controls • Missions across multiple space sectors • Daily challenges and crystal rewards • Unlockable ships with unique abilities • Custom trails and space backgrounds • Progressive difficulty • High-score tracking • Optional in-app purchases Master your timing, unlock new equipment, and see how far you can travel.

Screenshots

Planet Defense4 screens
Orbital Zero3 screens

Verdict

The call

The clearest difference is rating: Orbital Zero at 5.0 against Planet Defense's 4.6. Orbital Zero also leads on update cadence (every 3 days vs weekly). Planet Defense's advantage is ratings volume (2.9K vs 4) and chart position (#164 vs unranked). On price, ads, in-app purchases and monetization model 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. Planet Defense sells 10 one-off in-app purchases and Orbital Zero sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Orbital Zero holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Planet Defense has 2.9K ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Planet Defense ships an update weekly, Orbital Zero every 3 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 6 level
Planet Defense versus Orbital Zero: the parameters behind the verdict, then further details
ParameterPlanet DefenseOrbital Zero
PriceFreeFree
Rating4.6 (2.9K ratings)5.0 (4 ratings) — better
Positive reviews28.5% of reviews—
Number of ratings2.9K — better4
Update frequencyWeeklyEvery 3 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#164 — better—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size646 MB19 MB
Age rating12+4+
DeveloperCYBERJOY LIMITEDBrusa

Customer experience

Planet Defense

All ratings2,875 ratings
Positive91.0%
Neutral3.4%
Negative5.6%
Written reviews362 reviews
Positive28.5%
Neutral12.4%
Negative59.1%

Orbital Zero

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Planet Defense

Reported bugs

2 issues
  • Inconsistent level completion rewards
  • Weapons becoming weaker after upgrades

Requested features

3 requests
  • Faster progression and upgrades
  • More free-to-play friendly monetization
  • Improved stability and reduced crashes

Orbital Zero

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Planet Defense

One-time10
  • StarterPack_1$2.99
  • LevelPack_1$4.99
  • Normal Battlepass$4.99
Show 7 more
  • Delux Monthly Card$9.99
  • 680 Diamond$9.99
  • StarterPack_2$9.99
  • Journey Pass - Conqueror Pass$9.99
  • Medal Event Boost$14.99
  • 1400 Diamond$19.99
  • Delux LifeTime Card$49.99
4 purchases

Orbital Zero

One-time4
  • Crystal Pack 60$0.99
  • Remove Ads$1.99
  • Crystal Pack 250$3.99
Show 1 more
  • Crystal Pack 700$8.99

Questions

Is Planet Defense free?
Planet Defense is free to download, with in-app purchases available.
Is Orbital Zero free?
Orbital Zero is free to download, with in-app purchases available.
Which has better reviews, Planet Defense or Orbital Zero?
Orbital Zero is rated higher. Planet Defense averages 4.6 out of 5 from 2.9K ratings, while Orbital Zero averages 5.0 from 4 ratings.
Do Planet Defense or Orbital Zero have ads?
Both Planet Defense and Orbital Zero show ads.
Which is updated more often, Planet Defense or Orbital Zero?
Planet Defense ships an update weekly, and Orbital Zero every 3 days. Most recently, Planet Defense was updated on November 8, 2026 and Orbital Zero on October 31, 2026.

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