# Space Towers vs AlienRuins

The clearest difference is in-app purchases: AlienRuins at none against Space Towers's 9. Space Towers's advantage is update cadence (weekly vs every 25 months) and price ($0.49 vs $4.99). On ads, device support and iOS requirement there is nothing between them.

Space Towers costs $0.49 and AlienRuins $4.99 up front. Space Towers sells 9 one-off in-app purchases. AlienRuins asks for nothing beyond the download.

Space Towers ships an update weekly, AlienRuins every 25 months. The most recent releases landed on September 14, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Space Towers | AlienRuins |
| --- | --- | --- |
| Price | **$0.49** | $4.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 25 months |
| Best chart rank | **#196** | — |
| Size | 45 MB | 160 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Dmytro Denys](https://appshunter.io/developer/429279016) | [钊恒 郑](https://appshunter.io/developer/1352374582) |

## What reviewers say

### Space Towers

[App page](https://appshunter.io/ios/app/space-towers-stack-puzzle/id774739001)

**Currently charting:** #196 Top Paid · Casual (US App Store)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Big Undo Sack | $0.49 | one-time |
| HUGE UNDO SACK | $0.69 | one-time |
| Jumbo Undo Sack | $0.99 | one-time |
| Six Color Towers Puzzles Key | $0.99 | one-time |
| Seven Color Towers Puzzles Key | $0.99 | one-time |
| Eight Color Towers Puzzles Key | $0.99 | one-time |
| Unlimited Undo | $1.99 | one-time |
| Puzzle Generator Infinity Key | $1.99 | one-time |
| Universal Key | $1.99 | one-time |


### AlienRuins

[App page](https://appshunter.io/ios/app/alienruins/id1460557006)

**In-app purchases:** none


## Frequently asked questions

### Is Space Towers free?

Space Towers costs $0.49, and also offers in-app purchases.

### Is AlienRuins free?

AlienRuins costs $4.99, with no in-app purchases.

### Do Space Towers or AlienRuins have ads?

Neither Space Towers nor AlienRuins shows ads.

### Which is updated more often, Space Towers or AlienRuins?

Space Towers ships an update weekly, and AlienRuins every 25 months. Most recently, Space Towers was updated on September 14, 2026 and AlienRuins on September 27, 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.*