# Space Cadet Defender vs Galaxy Invaders 2

The clearest difference is in-app purchases: Galaxy Invaders 2 at none against Space Cadet Defender's 8. Space Cadet Defender's advantage is ads (none vs shown) and update cadence (every 2 months vs every 32 months). On price and device support there is nothing between them.

Both are free to download. Space Cadet Defender sells 8 one-off in-app purchases. Galaxy Invaders 2 asks for nothing beyond the download.

Space Cadet Defender ships an update every 2 months, Galaxy Invaders 2 every 32 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Space Cadet Defender | Galaxy Invaders 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (22 ratings)](https://appshunter.io/ios/app/space-cadet-defender/id345114616/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 74.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 32 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 135 MB |
| Requires iOS | **3.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SixHourSoft LLC](https://appshunter.io/developer/345114619) | [Taiwei Chiu](https://appshunter.io/developer/1516738132) |

## What reviewers say

### Space Cadet Defender

[App page](https://appshunter.io/ios/app/space-cadet-defender/id345114616)

Defend Earth from alien invaders in this fast-paced arcade shooter. Progress through 50 unique levels, upgrade your ship with powerful enhancements, and face off against challenging boss battles. Compete with friends by viewing local and world high scores.

**Highlights:** Fast-paced arcade gameplay, 50 unique levels, Ship upgrades, Boss battles, Unique power-ups, Score viewing

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Level Pack 1 | $0.99 | one-time |
| Cannon Upgrade | $0.99 | one-time |
| Artillery Upgrade | $0.99 | one-time |
| Shield Upgrade | $0.99 | one-time |
| Nuke Power Upgrade | $0.99 | one-time |
| Engine Speed Upgrade | $0.99 | one-time |
| Nuke Pack of 20 | $0.99 | one-time |
| Extra Life | $0.99 | one-time |


### Galaxy Invaders 2

[App page](https://appshunter.io/ios/app/galaxy-invaders-2/id1544638829)

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

**In-app purchases:** none


## Frequently asked questions

### Is Space Cadet Defender free?

Space Cadet Defender is free to download, with in-app purchases available.

### Is Galaxy Invaders 2 free?

Galaxy Invaders 2 is free to download, with no in-app purchases.

### Do Space Cadet Defender or Galaxy Invaders 2 have ads?

Galaxy Invaders 2 shows ads; Space Cadet Defender does not.

### Which is updated more often, Space Cadet Defender or Galaxy Invaders 2?

Space Cadet Defender ships an update every 2 months, and Galaxy Invaders 2 every 32 months. Most recently, Space Cadet Defender was updated on October 27, 2026 and Galaxy Invaders 2 on October 25, 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.*