# Invaders(Simple) vs RETRO

The clearest difference is in-app purchases: Invaders(Simple) at none against RETRO's 1. Invaders(Simple) also leads on ads (none vs shown) and review sentiment (63% vs 35%). RETRO's advantage is ratings volume (15 vs 1). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. RETRO sells 1 one-off in-app purchase. Invaders(Simple) asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Invaders(Simple) against 4.9 for RETRO. That said, the two scores are not equally well evidenced: RETRO has 15 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 63% of Invaders(Simple)'s written reviews are positive against 35% of RETRO's.

Invaders(Simple) ships an update every 20 months, RETRO every 11 months. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Invaders(Simple) | RETRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/invaderssimple/id910019357/reviews)** | [4.9 (15 ratings)](https://appshunter.io/ios/app/retro-space/id1376056227/reviews) |
| Number of ratings | 1 | **15** |
| Positive reviews | **62.5% of reviews** | 35.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 20 months | **Every 11 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 107 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Masanao Baba](https://appshunter.io/developer/803806609) | [Apps Bergman Ltda](https://appshunter.io/developer/1117417290) |

## What reviewers say

### Invaders(Simple)

[App page](https://appshunter.io/ios/app/invaderssimple/id910019357)

A classic retro shooter game inspired by Space Invaders. Experience simple, nostalgic gameplay with a focus on pure shooting action. Perfect for quick gaming sessions.

**Highlights:** Retro shooter gameplay, Classic arcade style, Simple controls, Nostalgic experience

**Features:** macOS Compatibility

**In-app purchases:** none


### RETRO

[App page](https://appshunter.io/ios/app/retro-space/id1376056227)

Pilot a spacecraft in this retro-inspired arcade shooter. Blast through waves of alien invaders and face off against powerful bosses across eight challenging levels. Compete for the highest score and enjoy a modern take on classic mobile gaming.

**Highlights:** 8 levels, 8 bosses, Diverse enemies, Modern graphics, Classic gameplay, Score comparison

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove all ads | $2.99 | one-time |


## Frequently asked questions

### Is Invaders(Simple) free?

Invaders(Simple) is free to download, with no in-app purchases.

### Is RETRO free?

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

### Which has better reviews, Invaders(Simple) or RETRO?

Invaders(Simple) is rated higher. Invaders(Simple) averages 5.0 out of 5 from 1 ratings, while RETRO averages 4.9 from 15 ratings.

### Do Invaders(Simple) or RETRO have ads?

RETRO shows ads; Invaders(Simple) does not.

### Which is updated more often, Invaders(Simple) or RETRO?

Invaders(Simple) ships an update every 20 months, and RETRO every 11 months. Most recently, Invaders(Simple) was updated on October 4, 2026 and RETRO on October 7, 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.*