# Alien Invader Escape vs Ghost Tower

The clearest difference is ads: Ghost Tower at none against Alien Invader Escape's shown. Ghost Tower also leads on update cadence (daily vs every 18 months) and iOS requirement (12.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Alien Invader Escape ships an update every 18 months, Ghost Tower daily. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Alien Invader Escape | Ghost Tower |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Daily** |
| Size | 14 MB | 48 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tang Cho man](https://appshunter.io/developer/592719186) | [HIDETO KUROSE](https://appshunter.io/developer/1746917263) |

## What reviewers say

### Alien Invader Escape

[App page](https://appshunter.io/ios/app/alien-invader-escape/id858894874)

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

**In-app purchases:** none


### Ghost Tower

[App page](https://appshunter.io/ios/app/ghost-tower/id6504737589)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Alien Invader Escape free?

Alien Invader Escape is free to download, with no in-app purchases.

### Is Ghost Tower free?

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

### Do Alien Invader Escape or Ghost Tower have ads?

Alien Invader Escape shows ads; Ghost Tower does not.

### Which is updated more often, Alien Invader Escape or Ghost Tower?

Alien Invader Escape ships an update every 18 months, and Ghost Tower daily. Most recently, Alien Invader Escape was updated on September 26, 2026 and Ghost Tower on October 1, 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.*