Comparison

Blue Defense vs Rocket Protector

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

Head to head
About

Blue Defense

Defend your planet from alien invaders using a powerful cannon. Engage in intense arcade action with various game modes, leaderboards, and unlockable content. Enjoy updated retro graphics and flexible controls.

Highlights
  • Planet cannon for mass enemy destruction
  • Gauntlet mode to win the game
  • Infinite-Classic and Infinite-Quickstart modes
  • Level select with medal earning
  • 74 global leaderboards
  • Automatic save state
  • Multi-touch and tilt controls
Features
Read full description

"Entirely unique, without peer on the app store!" - NoDpad "Original, intense, addictive, and most of all, fun!" - 148apps Intense planetary defense arcade action! The Blue planet is in peril - take the fight into your own hands, and blast the evil Red and Green enemies out of the sky with the all-new planet cannon! Blue Defense: Second Wave builds on the legendary pick-up-and-play gameplay of the original 2008 hit, hailed as an "App Store classic" by many. With game modes ranging from just seconds to several hours, you won't be able to put it down!* 6.8 billion lives hang in the balance... how long can you keep them alive? "A game that's not to be missed." - TouchArcade "A brilliantly executed game... Replay value is outstanding!" - AppSmile Features: - The planet cannon lets you take out hundreds of enemies at once! - All-new Gauntlet mode lets you win the game!** - Infinite-Classic and Infinite-Quickstart modes - last as long as you can! - Level select mode - practice a level, and earn medals for your skills! - 74 mode-based global leaderboards! - Automatic save state - continue your game, even without iOS 4! - Updated retro art style - iPhone 4 Retina resolution graphics - Runs smooth and fast even on the oldest devices Content: - Red and Green enemies! - 24 enemy types! - 64 all-new levels! - Over 200 medals to obtain! Controls: - Both multitouch and tilt controls available, both can be used simultaneously - Tilt controls: bullets shoot up, unless there's no gravity where you are - Multi-target locking: double-tap the screen where you want to continue shooting - Planet cannon: tap and drag from the planet to aim, release to fire - Double-tap the planet to pause * Seriously, there's a guy who told me he'd play it quietly in his pew waiting for church to start! ** It's the only game mode where you can have more than 0 lives at the end...

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.

Screenshots

Blue Defense4 screens
Rocket Protector4 screens

Verdict

The call

The clearest difference is rating: Blue Defense at 4.3 against Rocket Protector's 3.0. Blue Defense also leads on ads (none vs shown) and update cadence (every 3 months vs every 24 months). Rocket Protector's advantage is iOS requirement (13.0 vs 16.0). On price, in-app purchases, monetization model 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. Blue Defense sells 1 one-off in-app purchase and Rocket Protector sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Blue Defense holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Blue Defense has 20 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Blue Defense ships an update every 3 months, Rocket Protector every 24 months. The most recent releases landed on September 21, 2026 and August 18, 2026 respectively.

Scorecard5 real differences · 5 level
Blue Defense versus Rocket Protector: the parameters behind the verdict, then further details
ParameterBlue DefenseRocket Protector
PriceFreeFree
Rating4.3 (20 ratings) — better3.0 (2 ratings)
Positive reviews81.6% of reviews—
Number of ratings20 — better2
Update frequencyEvery 3 months — betterEvery 24 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size16 MB42 MB
Age rating9+4+
DeveloperCat in a Box SoftwareALEXEY KOZLOV

Customer experience

Blue Defense

All ratings20 ratings
Positive85.0%
Neutral0.0%
Negative15.0%
Written reviews49 reviews
Positive81.6%
Neutral4.1%
Negative14.3%

Rocket Protector

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

1 purchases

Blue Defense

One-time1
  • Full Content$1.99
3 purchases

Rocket Protector

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

Questions

Is Blue Defense free?
Blue Defense is free to download, with in-app purchases available.
Is Rocket Protector free?
Rocket Protector is free to download, with in-app purchases available.
Which has better reviews, Blue Defense or Rocket Protector?
Blue Defense is rated higher. Blue Defense averages 4.3 out of 5 from 20 ratings, while Rocket Protector averages 3.0 from 2 ratings.
Do Blue Defense or Rocket Protector have ads?
Rocket Protector shows ads; Blue Defense does not.
Which is updated more often, Blue Defense or Rocket Protector?
Blue Defense ships an update every 3 months, and Rocket Protector every 24 months. Most recently, Blue Defense was updated on September 21, 2026 and Rocket Protector on August 18, 2026.

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