# Idle Zombies vs Idle Alien

The clearest difference is review sentiment: Idle Alien at 100% against Idle Zombies's 54%. Idle Alien also leads on in-app purchases (none vs 10) and update cadence (every 11 days vs every 3 weeks). Idle Zombies's advantage is ratings volume (67K vs 123) and rating (4.8 vs 4.5). On price, ads and device support there is nothing between them.

Both are free to download. Idle Zombies sells 10 one-off in-app purchases. Idle Alien asks for nothing beyond the download.

Idle Zombies holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Idle Zombies has 67K ratings behind it against 123, so its average is the more settled of the two. Written reviews complicate that: 54% of Idle Zombies's written reviews are positive against 100% of Idle Alien's, so the app with the better star average is not the one people write more warmly about.

Idle Zombies ships an update every 3 weeks, Idle Alien every 11 days. The most recent releases landed on September 26, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | Idle Zombies | Idle Alien |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (67K ratings)](https://appshunter.io/ios/app/idle-zombies/id1370346970/reviews)** | [4.5 (123 ratings)](https://appshunter.io/ios/app/idle-alien/id1374126355/reviews) |
| Number of ratings | **67K** | 123 |
| Positive reviews | 53.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 144 MB | 295 MB |
| Requires iOS | **12.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Lion Studios](https://appshunter.io/developer/1362220666) | [Viet Game Development Corporation](https://appshunter.io/developer/945300832) |

## What reviewers say

### Idle Zombies

[App page](https://appshunter.io/ios/app/idle-zombies/id1370346970)

Defend cities from a relentless zombie horde in this idle defense game. Upgrade your arsenal with earned currency, unlock unique weapons and skills, and battle legendary bosses. It's an easy-to-learn, tough-to-master experience that tests your swiping and tapping skills.

**Highlights:** Idle defense gameplay, Upgrade weapons and artillery, Battle legendary bosses, Unlock unique skills and weapons, Crazy Mode for increased challenge, Daily login rewards

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Micro Diamond Package | $0.99 | one-time |
| Gift For New Player | $0.99 | one-time |
| Super Weapon Package | $0.99 | one-time |
| Weapons of destruction | $0.99 | one-time |
| DAM of Knife x 99 | $0.99 | one-time |
| Much More Money | $1.99 | one-time |
| No Ad Forever | $2.99 | one-time |
| Week Package | $2.99 | one-time |
| Super Discount Package | $9.99 | one-time |
| City Pass | $9.99 | one-time |

**What reviewers like**

- 🚀 Fast gameplay
- 💰 Earn money quickly
- 🔥 Exciting and addictive
- 👍 Great time killer

**What reviewers complain about**

- 🐛 Frequent crashes and glitches
- 💰 Aggressive monetization
- 🕰️ Slow progression at higher levels
- 🔍 Lack of instructions/tutorials

**Reported bugs**

- Weapons freezing at high upgrade levels
- Offline revenue not tracking correctly
- Resets causing loss of progress
- Ads not working as intended

**Requested features**

- Auto-upgrade option for weapons
- More variety in weapon types and abilities
- Offline progress improvements
- Better boss fight mechanics


### Idle Alien

[App page](https://appshunter.io/ios/app/idle-alien/id1374126355)

Engage in a hyper-casual space war by tapping to destroy hostile spaceships. Upgrade your alien heroes to increase damage and unlock new abilities. Enjoy a stress-relieving, offline gaming experience.

**Highlights:** Tap to attack spaceships, Upgrade alien heroes, Boost damage and gold, Offline gameplay, Stress-relieving mechanics, Unlock new aliens

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Idle Zombies free?

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

### Is Idle Alien free?

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

### Which has better reviews, Idle Zombies or Idle Alien?

Idle Zombies is rated higher. Idle Zombies averages 4.8 out of 5 from 67K ratings, while Idle Alien averages 4.5 from 123 ratings.

### Do Idle Zombies or Idle Alien have ads?

Both Idle Zombies and Idle Alien show ads.

### Which is updated more often, Idle Zombies or Idle Alien?

Idle Zombies ships an update every 3 weeks, and Idle Alien every 11 days. Most recently, Idle Zombies was updated on September 26, 2026 and Idle Alien on July 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.*