# Alien Annihilation Agent vs Geometry Tower

The clearest difference is in-app purchases: Alien Annihilation Agent at none against Geometry Tower's 16. Alien Annihilation Agent also leads on rating (5.0 vs 4.7) and iOS requirement (12.0 vs 15.0). Geometry Tower's advantage is ratings volume (4.7K vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Geometry Tower sells 16 one-off in-app purchases. Alien Annihilation Agent asks for nothing beyond the download.

Alien Annihilation Agent holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Geometry Tower has 4.7K ratings behind it against 1, so its average is the more settled of the two.

Alien Annihilation Agent ships an update every 3 weeks, Geometry Tower fortnightly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Alien Annihilation Agent | Geometry Tower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/alien-annihilation-agent/id6449690896/reviews)** | [4.7 (4.7K ratings)](https://appshunter.io/ios/app/geometry-tower-idle-defense/id6499506776/reviews) |
| Number of ratings | 1 | **4.7K** |
| Positive reviews | — | 26.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 239 MB | 265 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GRAVITY NEOCYON](https://appshunter.io/developer/1561085852) | [CYBERJOY LIMITED](https://appshunter.io/developer/1602455961) |

## What reviewers say

### Alien Annihilation Agent

[App page](https://appshunter.io/ios/app/alien-annihilation-agent/id6449690896)

Defend humanity's last hope by strategically deploying and upgrading defensive towers. Prevent waves of alien creatures from reaching your base in this engaging mobile strategy game.

**Highlights:** Strategic tower deployment, Tower upgrades for enhanced power, Prevent enemy base invasion, Intuitive interface, Short play sessions, Mobile-friendly gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


### Geometry Tower

[App page](https://appshunter.io/ios/app/geometry-tower-idle-defense/id6499506776)

Engage in strategic tower defense battles with roguelike elements. Upgrade your tower, collect resources, and refine your tactics to withstand endless waves of enemies. Enjoy stylized geometric art and addictive idle gameplay.

**Highlights:** Roguelike gameplay with upgrade choices, Idle tower defense with resource collection, Strategic tower upgrades and research, Endless waves of enemies, Stylized geometric art design

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

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 240 Diamonds | $2.99 | one-time |
| Golden Piggy 1 | $2.99 | one-time |
| Pack 1 | $2.99 | one-time |
| Common Battle Pass | $4.99 | one-time |
| Golden Piggy 2 | $4.99 | one-time |
| Pack 2 | $4.99 | one-time |
| Normal Growth Fund 1 | $6.99 | one-time |
| Delux Monthly Card | $9.99 | one-time |
| Rare Battle Pass | $9.99 | one-time |
| Pack 4 | $9.99 | one-time |
| Delux Growth Fund 1 | $19.99 | one-time |
| Pack 5 | $19.99 | one-time |
| Pack 6 | $29.99 | one-time |
| Delux Card Upgrade | $39.99 | one-time |
| Pack 7 | $49.99 | one-time |
| Delux Life Time Card | $49.99 | one-time |

**What reviewers like**

- 🚀 Simple yet challenging gameplay
- 👍 Attractive visuals
- 🎮 Fun for a while

**What reviewers complain about**

- 🔍 Difficulty spike after early levels
- 💰 Heavily monetized with aggressive in-app purchases
- 🔁 Repetitive gameplay
- 🐛 Bugs and crashes
- 🔋 Performance issues on some devices

**Reported bugs**

- Ads causing game freezes and crashes
- Inability to rejoin battles after ad interruptions
- Weapon/upgrade selection issues

**Requested features**

- Add an endless mode
- Improve weapon/upgrade selection and progression
- Optimize performance and reduce overheating
- Reduce reliance on ads and in-app purchases


## Frequently asked questions

### Is Alien Annihilation Agent free?

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

### Is Geometry Tower free?

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

### Which has better reviews, Alien Annihilation Agent or Geometry Tower?

Alien Annihilation Agent is rated higher. Alien Annihilation Agent averages 5.0 out of 5 from 1 ratings, while Geometry Tower averages 4.7 from 4.7K ratings.

### Do Alien Annihilation Agent or Geometry Tower have ads?

Both Alien Annihilation Agent and Geometry Tower show ads.

### Which is updated more often, Alien Annihilation Agent or Geometry Tower?

Alien Annihilation Agent ships an update every 3 weeks, and Geometry Tower fortnightly. Most recently, Alien Annihilation Agent was updated on October 24, 2026 and Geometry Tower on October 30, 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.*