# Blue Defense vs Rocket Protector

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.

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.

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.

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.

## The numbers

| Metric | Blue Defense | Rocket Protector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (20 ratings)](https://appshunter.io/ios/app/blue-defense-second-wave/id389817492/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/rocket-protector/id1410179786/reviews) |
| Number of ratings | **20** | 2 |
| Positive reviews | 81.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 24 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 16 MB | 42 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Cat in a Box Software](https://appshunter.io/developer/1600179204) | [ALEXEY KOZLOV](https://appshunter.io/developer/1393860478) |

## 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 |


### Rocket Protector

[App page](https://appshunter.io/ios/app/rocket-protector/id1410179786)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| 100 mineral | $0.99 | one-time |
| 500 mineral | $1.99 | one-time |


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