# Alien Evolution vs Space Tower Defense

The clearest difference is ads: Space Tower Defense at none against Alien Evolution's shown. Space Tower Defense also leads on update cadence (weekly vs monthly) and rating (5.0 vs 4.7). Alien Evolution's advantage is ratings volume (7 vs 2) and iOS requirement (15.0 vs 18.5). On price, review sentiment, in-app purchases and monetization model there is nothing between them.

Both are free to download. Alien Evolution sells 2 one-off in-app purchases and Space Tower Defense sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Space Tower Defense holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Alien Evolution ships an update monthly, Space Tower Defense weekly. The most recent releases landed on October 15, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Alien Evolution | Space Tower Defense |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (7 ratings)](https://appshunter.io/ios/app/alien-evolution-kaiju-monster/id6778645412/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/space-tower-defense/id6780271383/reviews)** |
| Number of ratings | **7** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 117 MB | 21 MB |
| Requires iOS | **15.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Kittipong Rukpanitmanee](https://appshunter.io/developer/1032976001) | [Tobias Ehret](https://appshunter.io/developer/1829643087) |

## What reviewers say

### Alien Evolution

[App page](https://appshunter.io/ios/app/alien-evolution-kaiju-monster/id6778645412)

Control a small alien organism, devour cells and smaller creatures to grow and evolve into a powerful kaiju monster. Unleash rage mode to dominate the neon space world and climb the food chain.

**Highlights:** Devour cells and monsters to evolve, Mutate into giant titan kaiju forms, Unleash devastating RAGE mode, Explore a neon alien universe, Easy one-hand io controls, Grow and dominate the food chain

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Skill Point Pack 1 | $0.99 | one-time |
| VIP Pass | $2.99 | one-time |


### Space Tower Defense

[App page](https://appshunter.io/ios/app/space-tower-defense/id6780271383)

Defend your home planet in a futuristic space strategy game. Build and upgrade orbital satellites to survive waves of unique enemy spaceships. Adapt your tactics to overcome escalating challenges and boss encounters.

**Highlights:** 30 handcrafted waves, Multiple enemy types with unique abilities, Orbital satellite towers with upgrade progression, Boss enemies and escalating wave combinations, Tactical boosts for critical moments, No ads

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game Unlock | $1.99 | one-time |


## Frequently asked questions

### Is Alien Evolution free?

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

### Is Space Tower Defense free?

Space Tower Defense is free to download, with in-app purchases available.

### Which has better reviews, Alien Evolution or Space Tower Defense?

Space Tower Defense is rated higher. Alien Evolution averages 4.7 out of 5 from 7 ratings, while Space Tower Defense averages 5.0 from 2 ratings.

### Do Alien Evolution or Space Tower Defense have ads?

Alien Evolution shows ads; Space Tower Defense does not.

### Which is updated more often, Alien Evolution or Space Tower Defense?

Alien Evolution ships an update monthly, and Space Tower Defense weekly. Most recently, Alien Evolution was updated on October 15, 2026 and Space Tower Defense on October 22, 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.*