# Zww3 vs Train Loop

The clearest difference is in-app purchases: Train Loop at none against Zww3's 1. Train Loop also leads on update cadence (daily vs every 4 weeks) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Zww3 sells 1 one-off in-app purchase. Train Loop asks for nothing beyond the download.

Zww3 ships an update every 4 weeks, Train Loop daily. The most recent releases landed on October 5, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Zww3 | Train Loop |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 4 weeks | **Daily** |
| Size | 371 MB | 192 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 9+ |
| Developer | [Sphulling Technologies](https://appshunter.io/developer/1540194995) | [OkiGen Games](https://appshunter.io/developer/1551346306) |

## What reviewers say

### Zww3

[App page](https://appshunter.io/ios/app/zww3-zombie-world-war/id6444016262)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zww3 Fan | $2.99 | one-time |


### Train Loop

[App page](https://appshunter.io/ios/app/train-loop/id6738042046)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zww3 free?

Zww3 is free to download, with in-app purchases available.

### Is Train Loop free?

Train Loop is free to download, with no in-app purchases.

### Do Zww3 or Train Loop have ads?

Both Zww3 and Train Loop show ads.

### Which is updated more often, Zww3 or Train Loop?

Zww3 ships an update every 4 weeks, and Train Loop daily. Most recently, Zww3 was updated on October 5, 2026 and Train Loop on October 25, 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.*