Comparison

Blue Defense! vs Evil Ducks Castle

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 an relentless invasion force. This action-packed game challenges your reflexes and strategic thinking as you manage increasing pressure from attackers. Experience classic gameplay with modern features like level selection and global leaderboards.

Highlights
  • Classic mode gameplay
  • Quick Start difficulty selection
  • Level Select for practice and medals
  • Global High Scores list
  • Save state functionality
  • Tilt controls for aiming
Features
Read full description

Defend your planet! Blue Defense puts you in charge of protecting your world from an invasion force that wants nothing more than your utter destruction. 6.7 billion lives hang in the balance... are your hands steady enough to handle the ever-increasing pressure of the attackers? Features: - Classic mode: play the game as it was in the original game - Quick Start mode: choose a starting difficulty! - Level Select mode: practice individual levels, start the game on your favourite level, or try to earn medals! - Clean, oldschool graphical style - Global High scores list - Save state ensures that you can leave and come back to your game at any time Controls: - Hold the device upright - Tilt left and right to control the stream of bullets - Double-tap the screen to pause Reviews: "If you like shooters, you should just get this game ... it’s all about the gameplay." -Touch Arcade "Fantastic, simple, fun, wonderful game. Very unexpected but very much appreciated." -148Apps "the way it effortlessly shifts from style to style and handles motion controls make[s it] fresh in a decades-old genre. It's a bullseye for any shooter fan." -Maclife "Blue Defense! is tastefully designed and brimming with twists, turns and tongue biting. Its polished graphics, smooth animation and habit-forming gameplay are praiseworthy." -TouchMyApps "A great space shooter that utilizes the iPhones controls to the max." -Everyday Gamers "Apple has finally released the [2.0] update and it does NOT disappoint." -The APPera "'Tilt to aim. Bullets shoot straight up.' I said, 'that’s it?' The answer was a wall of red death streaming down towards my planet." -appleiphoneapps.com

About

Evil Ducks Castle

Features
Read full description

Action packed endless flying style game with an end! Fly through 10 intense rhythm based stages to get through the castle. Avoid all obstacles in your way and Beware of the Evil Ducks Ghost who is lurking within the castle. Tap Tap or Tap and hold simple one touch controls.

Screenshots

Blue Defense!4 screens
Evil Ducks Castle4 screens

Verdict

The call

The clearest difference is update cadence: Blue Defense! at every 4 months against Evil Ducks Castle's every 37 months. Evil Ducks Castle's advantage is iOS requirement (12.2 vs 16.0). On price, ads, 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

Blue Defense! costs $0.99 and Evil Ducks Castle $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Blue Defense! ships an update every 4 months, Evil Ducks Castle every 37 months. The most recent releases landed on October 31, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 8 level
Blue Defense! versus Evil Ducks Castle: the parameters behind the verdict, then further details
ParameterBlue Defense!Evil Ducks Castle
Price$0.99$0.99
Rating4.1 (9 ratings) — better—
Positive reviews84.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 4 months — betterEvery 37 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.012.2 — better
Further details — not scored
Size9 MB21 MB
Age rating9+4+
DeveloperCat in a Box SoftwareAnthony Hindle

Bugs and requests

Blue Defense!

Reported bugs

2 issues
  • Crashes on newer iOS versions
  • Medals not saving properly

Requested features

5 requests
  • Add sound effects and background music
  • Option to invert or adjust controls
  • Gradual difficulty increase
  • Power-ups and weapon upgrades
  • Global high score leaderboards

Evil Ducks Castle

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Blue Defense!

No in-app purchases

None

Evil Ducks Castle

No in-app purchases

Questions

Is Blue Defense! free?
Blue Defense! costs $0.99, with no in-app purchases.
Is Evil Ducks Castle free?
Evil Ducks Castle costs $0.99, with no in-app purchases.
Do Blue Defense! or Evil Ducks Castle have ads?
Neither Blue Defense! nor Evil Ducks Castle shows ads.
Which is updated more often, Blue Defense! or Evil Ducks Castle?
Blue Defense! ships an update every 4 months, and Evil Ducks Castle every 37 months. Most recently, Blue Defense! was updated on October 31, 2026 and Evil Ducks Castle on October 26, 2026.

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