# Zombie Outbreak Simulator vs Overrun

The clearest difference is rating: Overrun at 4.6 against Zombie Outbreak Simulator's 4.1. Overrun also leads on update cadence (every 5 days vs every 3 months) and ratings volume (13K vs 1.7K). Zombie Outbreak Simulator's advantage is iOS requirement (12.0 vs 15.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Zombie Outbreak Simulator sells 10 one-off in-app purchases and Overrun sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Overrun holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: Overrun has 13K ratings behind it against 1.7K, so its average is the more settled of the two. Written reviews point the same way: 69% of Zombie Outbreak Simulator's written reviews are positive against 76% of Overrun's.

Zombie Outbreak Simulator ships an update every 3 months, Overrun every 5 days. Both last shipped on November 6, 2026.

## The numbers

| Metric | Zombie Outbreak Simulator | Overrun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (1.7K ratings)](https://appshunter.io/ios/app/zombie-outbreak-simulator/id523490663/reviews) | **[4.6 (13K ratings)](https://appshunter.io/ios/app/overrun-offline-tower-defense/id1534241963/reviews)** |
| Number of ratings | 1.7K | **13K** |
| Positive reviews | 69.1% of reviews | **76.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 103 MB | 484 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Binary Space Pty Ltd](https://appshunter.io/developer/499283439) | [Wildfire Games Ltd](https://appshunter.io/developer/1425919511) |

## What reviewers say

### Zombie Outbreak Simulator

[App page](https://appshunter.io/ios/app/zombie-outbreak-simulator/id523490663)

Simulate and customize zombie outbreaks in real-world locations using Google Maps. Control outbreak parameters, observe chaos unfold, and even join the fight with military interventions. Explore thousands of player-created maps or offline options.

**Highlights:** Real-world map simulation with Google Maps integration, Customizable outbreak parameters (zombie speed, civilian numbers, etc.), Observe infection spread from satellite to street view, Direct intervention with bombs, soldiers, and helicopters, Thousands of player-created maps, Offline map play

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Offline & Online Maps | $0.99 | one-time |
| Unlock Outbreak Settings | $0.99 | one-time |
| Unlimited Soldiers | $0.99 | one-time |
| Unlimited Mk81 Bombs | $0.99 | one-time |
| Unlimited Mk82 Bombs | $0.99 | one-time |
| Unlimited Helicopters | $0.99 | one-time |
| Unlock Player Maps - Americas | $1.99 | one-time |
| Unlimited Bombs, Soldiers & Helicopters | $2.99 | one-time |
| Unlock All Player Maps | $2.99 | one-time |
| Unlock Everything | $4.99 | one-time |

**What reviewers like**

- 🚀 Great simulator
- 🚀 Immersive gameplay
- 👍 Beautiful graphics
- 👍 Addictive and fun

**What reviewers complain about**

- 💰 Pay-to-play model
- 🐛 Bugs and glitches
- 🐛 AI issues
- 🔒 Limited free content

**Reported bugs**

- Civilians getting stuck in buildings
- Online and player-created maps not working
- Issues with watching ads for in-game rewards
- Restore purchases not working after reinstallation

**Requested features**

- Add more military units (tanks, helicopters, etc.)
- Implement a sandbox mode with more customization
- Improve zombie and civilian AI
- Add more maps and locations
- Introduce different zombie types and mutations


### Overrun

[App page](https://appshunter.io/ios/app/overrun-offline-tower-defense/id1534241963)

Lead a group of survivors in a post-apocalyptic world, building defenses and managing your team to fight off waves of attacking zombies. Collect loot, upgrade structures, and acquire powerful weapons to survive the undead horde.

**Highlights:** Wave-based zombie combat, Base building and defense upgrades, Item and weapon collection, Survivor team management, Survivor leveling and upgrades, Mid-wave item usage

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 Z Bucks | $1.99 | one-time |
| Power Up Item Pack | $1.99 | one-time |
| Starter Pack | $1.99 | one-time |
| 5000 Z Bucks | $2.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Unlock Everything | $2.99 | one-time |
| Explosive Item Pack | $2.99 | one-time |
| Flaming Item Pack | $2.99 | one-time |
| 10000 Z Bucks | $3.99 | one-time |

**What reviewers like**

- 🚀 Fast-paced gameplay
- 👍 Fun and creative concept
- 🕹️ Engaging tower defense mechanics
- 💰 Decent in-game rewards

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🔋 High battery consumption
- 🤖 Unbalanced difficulty progression
- 🔍 Limited camera controls

**Reported bugs**

- Survivors randomly dying during build phase
- Survivors getting stuck or behaving erratically
- Endless loading screen and save data loss issues
- Graphical glitches and visual bugs

**Requested features**

- Sandbox/custom game mode
- More varied map/level designs
- Improved survivor management
- Ability to upgrade/enhance defenses


## Frequently asked questions

### Is Zombie Outbreak Simulator free?

Zombie Outbreak Simulator is free to download, with in-app purchases available.

### Is Overrun free?

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

### Which has better reviews, Zombie Outbreak Simulator or Overrun?

Overrun is rated higher. Zombie Outbreak Simulator averages 4.1 out of 5 from 1.7K ratings, while Overrun averages 4.6 from 13K ratings.

### Do Zombie Outbreak Simulator or Overrun have ads?

Both Zombie Outbreak Simulator and Overrun show ads.

### Which is updated more often, Zombie Outbreak Simulator or Overrun?

Zombie Outbreak Simulator ships an update every 3 months, and Overrun every 5 days. Most recently, Zombie Outbreak Simulator was updated on November 6, 2026 and Overrun on November 6, 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.*