# Union Alert vs USFS Risk Calculator

The clearest difference is update cadence: Union Alert at every 3 days against USFS Risk Calculator's every 32 months. 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.

Union Alert ships an update every 3 days, USFS Risk Calculator every 32 months. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Union Alert | USFS Risk Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 32 months |
| Monetization | Free | — |
| Size | 56 MB | 42 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Union Systems Pty Ltd](https://appshunter.io/developer/571562885) | [US Forest Service](https://appshunter.io/developer/949583790) |

## What reviewers say

### Union Alert

[App page](https://appshunter.io/ios/app/union-alert/id966095253)

Access the Western Australian Firefighters shift calendar and easily add personal events. Stay organized with this dedicated scheduling tool.

**Highlights:** View firefighter shift calendar, Add personal events, WA specific calendar, Event scheduling

**Features:** macOS Compatibility

**In-app purchases:** none


### USFS Risk Calculator

[App page](https://appshunter.io/ios/app/usfs-risk-calculator/id1496807580)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Union Alert free?

Union Alert is free to download, with no in-app purchases.

### Is USFS Risk Calculator free?

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

### Do Union Alert or USFS Risk Calculator have ads?

Neither Union Alert nor USFS Risk Calculator shows ads.

### Which is updated more often, Union Alert or USFS Risk Calculator?

Union Alert ships an update every 3 days, and USFS Risk Calculator every 32 months. Most recently, Union Alert was updated on November 1, 2026 and USFS Risk Calculator 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.*