# PFA Mobile vs USPHS Exercise Challenge

The clearest difference is update cadence: USPHS Exercise Challenge at every 6 months against PFA Mobile's every 13 months. USPHS Exercise Challenge also leads on iOS requirement (13.0 vs 15.6). 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.

PFA Mobile ships an update every 13 months, USPHS Exercise Challenge every 6 months. The most recent releases landed on October 9, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | PFA Mobile | USPHS Exercise Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (11 ratings)](https://appshunter.io/ios/app/pfa-mobile/id551079424/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 6 months** |
| Monetization | Free | — |
| Size | 30 MB | 51 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [US Department of Veterans Affairs (VA)](https://appshunter.io/developer/430646305) | [Alsike, Inc.](https://appshunter.io/developer/1282377077) |

## What reviewers say

### PFA Mobile

[App page](https://appshunter.io/ios/app/pfa-mobile/id551079424)

This app assists responders in providing psychological first aid to adults, families, and children. It offers summaries of PFA fundamentals, interventions, mentor tips, a self-assessment tool, and a survivor needs form for data collection and referrals.

**Highlights:** PFA fundamentals summaries, Interventions for specific survivor needs, Mentor tips for field application, Self-assessment tool for responder readiness, Survivor needs form for data collection, Easy referral system

**Features:** macOS Compatibility

**In-app purchases:** none


### USPHS Exercise Challenge

[App page](https://appshunter.io/ios/app/usphs-exercise-challenge/id6740204765)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PFA Mobile free?

PFA Mobile is free to download, with no in-app purchases.

### Is USPHS Exercise Challenge free?

USPHS Exercise Challenge is free to download, with no in-app purchases.

### Do PFA Mobile or USPHS Exercise Challenge have ads?

Neither PFA Mobile nor USPHS Exercise Challenge shows ads.

### Which is updated more often, PFA Mobile or USPHS Exercise Challenge?

PFA Mobile ships an update every 13 months, and USPHS Exercise Challenge every 6 months. Most recently, PFA Mobile was updated on October 9, 2026 and USPHS Exercise Challenge on October 4, 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.*