# Blue Defense vs .Decluster

The clearest difference is in-app purchases: .Decluster at none against Blue Defense's 1. .Decluster also leads on rating (4.5 vs 4.3) and update cadence (every 5 weeks vs every 3 months). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Blue Defense sells 1 one-off in-app purchase. .Decluster asks for nothing beyond the download.

.Decluster holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 20 and 27 respectively. Written reviews point the same way: 82% of Blue Defense's written reviews are positive against 86% of .Decluster's.

Blue Defense ships an update every 3 months, .Decluster every 5 weeks. The most recent releases landed on September 21, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | Blue Defense | .Decluster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (20 ratings)](https://appshunter.io/ios/app/blue-defense-second-wave/id389817492/reviews) | **[4.5 (27 ratings)](https://appshunter.io/ios/app/decluster/id968976528/reviews)** |
| Number of ratings | 20 | **27** |
| Positive reviews | 81.6% of reviews | **86.2% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 16 MB | 54 MB |
| Requires iOS | 16.0 | **8.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 9+ |
| Developer | [Cat in a Box Software](https://appshunter.io/developer/1600179204) | [MASAYUKI ITO](https://appshunter.io/developer/820672202) |

## What reviewers say

### Blue Defense

[App page](https://appshunter.io/ios/app/blue-defense-second-wave/id389817492)

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:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Content | $1.99 | one-time |


### .Decluster

[App page](https://appshunter.io/ios/app/decluster/id968976528)

Engage in a vertically scrolling 2D shooter with simple controls and graphics. Dodge waves of bullets and enemies while firing a powerful homing laser to clear your path and earn bonuses. Offers multiple difficulty levels and customizable settings for an accessible bullet-hell experience.

**Highlights:** Simple two-finger controls, Homing laser with bullet canceling, Automatic basic shots, Small player hitbox, Game speed slowdown with many bullets, Four difficulty levels, Adjustable game view and touch sensitivity

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Blue Defense free?

Blue Defense is free to download, with in-app purchases available.

### Is .Decluster free?

.Decluster is free to download, with no in-app purchases.

### Which has better reviews, Blue Defense or .Decluster?

.Decluster is rated higher. Blue Defense averages 4.3 out of 5 from 20 ratings, while .Decluster averages 4.5 from 27 ratings.

### Do Blue Defense or .Decluster have ads?

Neither Blue Defense nor .Decluster shows ads.

### Which is updated more often, Blue Defense or .Decluster?

Blue Defense ships an update every 3 months, and .Decluster every 5 weeks. Most recently, Blue Defense was updated on September 21, 2026 and .Decluster on August 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*