# Overkill Zone 3D vs Code Z Day

The clearest difference is in-app purchases: Overkill Zone 3D at none against Code Z Day's 8. Overkill Zone 3D also leads on rating (5.0 vs 4.7) and review sentiment (100% vs 92%). Code Z Day's advantage is ratings volume (121 vs 1) and update cadence (every 4 months vs every 13 months). On price, ads and device support there is nothing between them.

Both are free to download. Code Z Day sells 8 one-off in-app purchases. Overkill Zone 3D asks for nothing beyond the download.

Overkill Zone 3D holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Code Z Day has 121 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Overkill Zone 3D's written reviews are positive against 92% of Code Z Day's.

Overkill Zone 3D ships an update every 13 months, Code Z Day every 4 months. The most recent releases landed on September 17, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Overkill Zone 3D | Code Z Day |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/overkill-zone-3d/id1505917695/reviews)** | [4.7 (121 ratings)](https://appshunter.io/ios/app/code-z-day-fps-scary-games-3d/id1596562983/reviews) |
| Number of ratings | 1 | **121** |
| Positive reviews | **100.0% of reviews** | 91.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 13 months | **Every 4 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 90 MB | 240 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [喜拉 任](https://appshunter.io/developer/1447216936) | [Andrey Baranov](https://appshunter.io/developer/1594543115) |

## What reviewers say

### Overkill Zone 3D

[App page](https://appshunter.io/ios/app/overkill-zone-3d/id1505917695)

Engage in a thrilling zombie apocalypse as a hero tasked with eliminating hordes of savage undead. Utilize a vast arsenal of upgradable weapons and strategic precision to survive intense battles and save humanity from extinction.

**Highlights:** Vast arsenal of upgradable weapons, Strategic zombie combat, Intense FPS action, Zombie apocalypse survival, Multiple weapon types, Destroy enemy bases

**In-app purchases:** none


### Code Z Day

[App page](https://appshunter.io/ios/app/code-z-day-fps-scary-games-3d/id1596562983)

Experience a chilling first-person shooter survival horror game set on a desolate space station. Battle terrifying mutants, explore dark corridors, and manage your resources to stay alive. The game offers realistic 3D graphics and offline play.

**Highlights:** Offline survival shooter gameplay, Realistic 3D horror graphics, Character ability upgrades, Save and load game progress, Detailed 3D map with secrets

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Recovery | $0.99 | one-time |
| Ammo | $0.99 | one-time |
| 2000 Credits | $1.99 | one-time |
| Disable Ads | $3.99 | one-time |
| Triple Revive | $4.99 | one-time |
| Ednless Ammo | $4.99 | one-time |
| Weapons Pack | $6.99 | one-time |
| Dis. Ads/Weapon Pack/Infinite Ammo | $9.99 | one-time |


## Frequently asked questions

### Is Overkill Zone 3D free?

Overkill Zone 3D is free to download, with no in-app purchases.

### Is Code Z Day free?

Code Z Day is free to download, with in-app purchases available.

### Which has better reviews, Overkill Zone 3D or Code Z Day?

Overkill Zone 3D is rated higher. Overkill Zone 3D averages 5.0 out of 5 from 1 ratings, while Code Z Day averages 4.7 from 121 ratings.

### Do Overkill Zone 3D or Code Z Day have ads?

Both Overkill Zone 3D and Code Z Day show ads.

### Which is updated more often, Overkill Zone 3D or Code Z Day?

Overkill Zone 3D ships an update every 13 months, and Code Z Day every 4 months. Most recently, Overkill Zone 3D was updated on September 17, 2026 and Code Z Day on September 9, 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.*