# Alien Run vs Sky Stackers

The clearest difference is review sentiment: Sky Stackers at 100% against Alien Run's 6%. Sky Stackers also leads on rating (5.0 vs 2.3) and ads (none vs shown). Alien Run's advantage is iOS requirement (13.0 vs 17.0). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Alien Run sells 17 one-off in-app purchases and Sky Stackers sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sky Stackers holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews point the same way: 6% of Alien Run's written reviews are positive against 100% of Sky Stackers's.

Alien Run ships an update every 9 days, Sky Stackers daily. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Alien Run | Sky Stackers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/alien-run-tentacle-attack/id6480405768/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/sky-stackers/id6764716002/reviews)** |
| Number of ratings | 3 | **4** |
| Positive reviews | 6.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Daily** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 132 MB | 8 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 12+ |
| Developer | [HAPPY GAME COMPANY TEKNOLOJI ANONIM SIRKETI](https://appshunter.io/developer/1523367113) | [Zackery Allen](https://appshunter.io/developer/1895890813) |

## What reviewers say

### Alien Run

[App page](https://appshunter.io/ios/app/alien-run-tentacle-attack/id6480405768)

Become an unstoppable alien invader in this action-packed survival game. Use your tentacle powers to capture fleeing humans and dominate the battlefield in an epic invasion scenario. Experience intense chases and strategic mob control as the ultimate predator.

**Highlights:** Alien invasion gameplay, Tentacle attack and capture, Mob control, Monster run challenges, Chase running humans, Strategic hunting

**Features:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Money Bundle 1 | $0.99 | one-time |
| Skip It Bundle 1 | $0.99 | one-time |
| Special Offer | $0.99 | one-time |
| 1 day No Ads | $0.99 | one-time |
| Skip It Bundle 2 | $1.99 | one-time |
| Skip It Bundle 3 | $4.99 | one-time |
| No Ads | $4.99 | one-time |
| Mini Alien | $5.99 | one-time |
| Bundle 1 | $6.99 | one-time |
| Bundle 3 | $6.99 | one-time |
| Mini Alien + No Ads | $8.99 | one-time |
| Bundle 2 | $8.99 | one-time |
| Money Bundle 4 | $9.99 | one-time |
| Skip It Bundle 4 | $9.99 | one-time |
| Bundle 4 | $14.99 | one-time |
| Bundle 5 | $19.99 | one-time |
| Bundle 6 | $39.99 | one-time |


### Sky Stackers

[App page](https://appshunter.io/ios/app/sky-stackers/id6764716002)

A fast-paced arcade game where players precisely drop blocks to build a tower as high as possible. The challenge increases with height, offering endless score chasing and quick, satisfying stacking sessions.

**Highlights:** One-touch gameplay, Endless score chasing, Satisfying stacking mechanics, Rewarded continues, Quick play sessions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Upgrade | $0.99 | one-time |


## Frequently asked questions

### Is Alien Run free?

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

### Is Sky Stackers free?

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

### Which has better reviews, Alien Run or Sky Stackers?

Sky Stackers is rated higher. Alien Run averages 2.3 out of 5 from 3 ratings, while Sky Stackers averages 5.0 from 4 ratings.

### Do Alien Run or Sky Stackers have ads?

Alien Run shows ads; Sky Stackers does not.

### Which is updated more often, Alien Run or Sky Stackers?

Alien Run ships an update every 9 days, and Sky Stackers daily. Most recently, Alien Run was updated on October 24, 2026 and Sky Stackers on October 9, 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.*