Comparison

Blue Defense vs Space Station

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

Space Station

Command an orbital fortress in this sci-fi tower defense game. Build and upgrade turrets, expand your station, and deploy powerful abilities to survive 100 challenging levels against alien invaders. Compete on global leaderboards and unlock achievements.

Highlights
  • 360° strategic defense
  • Station building and expansion
  • Multiple turret types with upgrades
  • Powerful special abilities
  • 100 escalating levels
  • Prestige system for replayability
  • Global leaderboards and achievements
Features
Read full description

Space Station: Defender is a sci-fi tower defense game where you command the last orbital fortress against relentless waves of alien invaders. Build turrets, expand your station, and survive 100 increasingly brutal levels across 5 enemy tiers. STRATEGIC 360° DEFENSE Enemies approach from every direction. Position turrets along your station's corridors, upgrade them to devastating power, and deploy special abilities at critical moments. Every placement matters — one gap in your defenses and the hull takes damage. BUILD & EXPAND YOUR STATION Start with a simple core and grow into an orbital fortress. Purchase corridor expansions, unlock new turret slots, and design your layout to create deadly killzones. With 20+ expansions possible, no two stations look the same. 6 TURRET TYPES, 5 UPGRADE TIERS From rapid-fire Blasters to devastating Railguns and area-denial Flak Cannons, each turret serves a unique tactical role. Upgrade through 5 tiers to unlock maximum firepower. 5 POWERFUL ABILITIES Turn the tide with Ion Pulse, Missile Barrage, Gravity Well, Solar Flare, and Quantum Rift. Time them right and watch entire enemy waves evaporate. 100 LEVELS OF ESCALATING CHALLENGE Face Scouts, Cruisers, Bombers, Carriers, and massive Bosses — each with Elite variants that demand new strategies. Every 10 waves ramps up the pressure. PRESTIGE & REPLAY Beaten level 100? Prestige to reset your progress with powerful permanent bonuses and prove your mastery all over again. GAME CENTER LEADERBOARDS & ACHIEVEMENTS Compete globally across 5 leaderboards including Highest Level, Total Kills, Daily Kill Count, Longest Win Streak, and Total Levels Won. Earn 16 achievements from First Blood to Station Legend. ARMORY UPGRADES Invest star credits into permanent upgrades: boost turret damage, increase hull strength, enhance shields, and more. Your station grows stronger with every session. No energy timers. No pay-to-win. Just pure strategic tower defense.

Screenshots

Blue Defense4 screens
Space Station4 screens

Verdict

The call

The clearest difference is rating: Blue Defense at 4.3 against Space Station's 3.7. Blue Defense also leads on ads (none vs shown) and review sentiment (82% vs 50%). Space Station's advantage is monetization model (ad-supported vs free with in-app purchases). 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. Blue Defense sells 1 one-off in-app purchase and Space Station sells 10 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 3.7. That said, the two scores are not equally well evidenced: Blue Defense has 20 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 82% of Blue Defense's written reviews are positive against 50% of Space Station's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
Blue Defense versus Space Station: the parameters behind the verdict, then further details
ParameterBlue DefenseSpace Station
PriceFreeFree
Rating4.3 (20 ratings) — better3.7 (3 ratings)
Positive reviews81.6% of reviews — better50.0% of reviews
Number of ratings20 — better3
Update frequencyEvery 3 monthsEvery 3 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size16 MB111 MB
Age rating9+4+
DeveloperCat in a Box SoftwareBrian Solomon

Customer experience

Blue Defense

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

Space Station

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

1 purchases

Blue Defense

One-time1
  • Full Content$1.99
10 purchases

Space Station

One-time10
  • 2,500 Star Credits$0.99
  • Remove Ads$2.99
  • Commander Pass$2.99
Show 7 more
  • Double Reward Credits (x2)$4.99
  • 10,000 Star Credits$4.99
  • 30,000 Star Credits$9.99
  • 75,000 Star Credits$19.99
  • 200,000 Star Credits$29.99
  • 500,000 Star Credits$49.99
  • 1,250,000 Star Credits$99.99

Questions

Is Blue Defense free?
Blue Defense is free to download, with in-app purchases available.
Is Space Station free?
Space Station is free to download, with in-app purchases available.
Which has better reviews, Blue Defense or Space Station?
Blue Defense is rated higher. Blue Defense averages 4.3 out of 5 from 20 ratings, while Space Station averages 3.7 from 3 ratings.
Do Blue Defense or Space Station have ads?
Space Station shows ads; Blue Defense does not.
Which is updated more often, Blue Defense or Space Station?
Blue Defense ships an update every 3 months, and Space Station every 3 months. Most recently, Blue Defense was updated on November 1, 2026 and Space Station on October 31, 2026.

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