# Alien Attack vs Span

The clearest difference is in-app purchases: Alien Attack at none against Span's 1. Alien Attack also leads on update cadence (daily vs every 5 days) and iOS requirement (15.0 vs 17.0). Span's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Span sells 1 one-off in-app purchase. Alien Attack asks for nothing beyond the download.

Alien Attack ships an update daily, Span every 5 days. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Alien Attack | Span |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/alien-attack-rpg-idle-action/id6778897821/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 5 days |
| Monetization | Ad-supported | — |
| Size | 180 MB | 60 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [HAPPY GAME COMPANY TEKNOLOJI ANONIM SIRKETI](https://appshunter.io/developer/1523367113) | [Dodecki Labs](https://appshunter.io/developer/1571436485) |

## What reviewers say

### Alien Attack

[App page](https://appshunter.io/ios/app/alien-attack-rpg-idle-action/id6778897821)

Control a rapidly evolving alien lifeform and conquer Earth. Consume humans to grow stronger, unlock new mutations, and dominate every battlefield. Upgrade your abilities and spread your alien domination across the planet.

**Highlights:** Evolve alien lifeform, Consume humans for energy, Unlock new mutations and powers, Action-packed battles, Upgrade abilities, Conquer world locations

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

**In-app purchases:** none


### Span

[App page](https://appshunter.io/ios/app/span-physics-bridge-builder/id6790187323)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Span Complete | $7.99 | one-time |


## Frequently asked questions

### Is Alien Attack free?

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

### Is Span free?

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

### Do Alien Attack or Span have ads?

Alien Attack shows ads; Span does not.

### Which is updated more often, Alien Attack or Span?

Alien Attack ships an update daily, and Span every 5 days. Most recently, Alien Attack was updated on October 5, 2026 and Span on October 4, 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.*