# TrainNavigator vs Quad Defects

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

Both are free to download. TrainNavigator sells 1 in-app purchase, starting at $7.99 per year. Quad Defects asks for nothing beyond the download.

TrainNavigator ships an update every 4 days, Quad Defects daily. The most recent releases landed on October 3, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | TrainNavigator | Quad Defects |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Daily** |
| Size | 28 MB | 32 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Michal Kajaba](https://appshunter.io/developer/987937761) | [Autosys Industrial Solutions Private Limited](https://appshunter.io/developer/1703269777) |

## What reviewers say

### TrainNavigator

[App page](https://appshunter.io/ios/app/trainnavigator/id6738654983)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrainNavigator Premium | $7.99 | per year |


### Quad Defects

[App page](https://appshunter.io/ios/app/quad-defects/id6748558117)

**In-app purchases:** none


## Frequently asked questions

### Is TrainNavigator free?

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

### Is Quad Defects free?

Quad Defects is free to download, with no in-app purchases.

### Do TrainNavigator or Quad Defects have ads?

Neither TrainNavigator nor Quad Defects shows ads.

### Which is updated more often, TrainNavigator or Quad Defects?

TrainNavigator ships an update every 4 days, and Quad Defects daily. Most recently, TrainNavigator was updated on October 3, 2026 and Quad Defects on October 16, 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.*