# Space Towers vs Purifie

The clearest difference is price: Purifie at Free against Space Towers's $0.49. Purifie also leads on in-app purchases (none vs 9). Space Towers's advantage is ads (none vs shown) and update cadence (weekly vs every 15 months). On device support and iOS requirement there is nothing between them.

Purifie is free to download; Space Towers costs $0.49 up front. Space Towers sells 9 one-off in-app purchases. Purifie asks for nothing beyond the download.

Space Towers ships an update weekly, Purifie every 15 months. The most recent releases landed on October 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Space Towers | Purifie |
| --- | --- | --- |
| Price | $0.49 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/purifie/id6478927640/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 15 months |
| Monetization | — | Ad-supported |
| Size | 45 MB | 232 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmytro Denys](https://appshunter.io/developer/429279016) | [米叶 罗](https://appshunter.io/developer/1648267461) |

## What reviewers say

### Space Towers

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

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

**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 |


### Purifie

[App page](https://appshunter.io/ios/app/purifie/id6478927640)

A special worm battles pollution and hostile creatures to restore a contaminated aquatic ecosystem. Help Wormie clean up the water and protect aquatic life.

**Highlights:** Combat pollution, Defend against hostile creatures, Restore aquatic ecosystem, Play as Wormie, Engaging storyline

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Space Towers free?

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

### Is Purifie free?

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

### Do Space Towers or Purifie have ads?

Purifie shows ads; Space Towers does not.

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

Space Towers ships an update weekly, and Purifie every 15 months. Most recently, Space Towers was updated on October 29, 2026 and Purifie on October 14, 2026.

---

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