Blue Defense vs Zen Bump 3D
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- 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
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"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...
Zen Bump 3D
Experience ultimate relaxation with this endlessly satisfying game. Simply bump shapes without any pressure or goals, offering a stress-free and enjoyable escape. It's a modern zen garden designed for pure, blissful entertainment.
- Endless levels
- Stress-free gameplay
- Satisfying bumping mechanics
- Relaxing atmosphere
- Simple controls
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Your newest, and most relaxing addiction. So easy to play and nothing to master, just bliss out bumping things endlessly. Relax and bump shapes around without a care. Nothing to avoid, nothing to make you lose, nothing to cause stress. Literally don’t even have to play it to have a satisfying and enjoyable time. Endless levels, it does not stop ever. A zen garden for modern times.
Screenshots
Verdict
The clearest difference is price: Blue Defense at Free against Zen Bump 3D's $1.99. Blue Defense also leads on ratings volume (20 vs 1). Zen Bump 3D's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 1). On update cadence, ads 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
Blue Defense is free to download; Zen Bump 3D costs $1.99 up front. Blue Defense sells 1 one-off in-app purchase. Zen Bump 3D asks for nothing beyond the download.
Zen Bump 3D holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Blue Defense has 20 ratings behind it against 1, 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 100% of Zen Bump 3D's.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | Blue Defense | Zen Bump 3D |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.3 (20 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 81.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 20 — better | 1 |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 90 MB |
| Age rating | 9+ | 4+ |
| Developer | Cat in a Box Software | Ben Lew |
Customer experience
Blue Defense
Zen Bump 3D
In-app purchases
Blue Defense
- Full Content$1.99
Zen Bump 3D
No in-app purchases









