# URMTrace STH vs Flight Risk

The clearest difference is update cadence: Flight Risk at monthly against URMTrace STH's every 38 months. URMTrace STH's advantage is iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

URMTrace STH ships an update every 38 months, Flight Risk monthly. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | URMTrace STH | Flight Risk |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Monthly** |
| Size | 20 MB | 286 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [锡敏 石](https://appshunter.io/developer/1015833793) | [Flight Risk Co Pty Ltd](https://appshunter.io/developer/1822751921) |

## What reviewers say

### URMTrace STH

[App page](https://appshunter.io/ios/app/urmtrace-sth/id1599675158)

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

**In-app purchases:** none


### Flight Risk

[App page](https://appshunter.io/ios/app/flight-risk/id6747754487)

**In-app purchases:** none


## Frequently asked questions

### Is URMTrace STH free?

URMTrace STH is free to download, with no in-app purchases.

### Is Flight Risk free?

Flight Risk is free to download, with no in-app purchases.

### Do URMTrace STH or Flight Risk have ads?

Neither URMTrace STH nor Flight Risk shows ads.

### Which is updated more often, URMTrace STH or Flight Risk?

URMTrace STH ships an update every 38 months, and Flight Risk monthly. Most recently, URMTrace STH was updated on October 4, 2026 and Flight Risk on October 10, 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.*