# NNPHI vs PrevailHQ

The clearest difference is update cadence: PrevailHQ at daily against NNPHI's every 6 weeks. PrevailHQ also leads on iOS requirement (13.0 vs 17.0). 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.

NNPHI ships an update every 6 weeks, PrevailHQ daily. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | NNPHI | PrevailHQ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Daily** |
| Size | 76 MB | 16 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [National Network of Public Health Institutes](https://appshunter.io/developer/1357188009) | [Clear To Go, Inc.](https://appshunter.io/developer/1512016491) |

## What reviewers say

### NNPHI

[App page](https://appshunter.io/ios/app/nnphi/id1209175330)

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

**In-app purchases:** none


### PrevailHQ

[App page](https://appshunter.io/ios/app/prevailhq/id6471518454)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NNPHI free?

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

### Is PrevailHQ free?

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

### Do NNPHI or PrevailHQ have ads?

Neither NNPHI nor PrevailHQ shows ads.

### Which is updated more often, NNPHI or PrevailHQ?

NNPHI ships an update every 6 weeks, and PrevailHQ daily. Most recently, NNPHI was updated on October 4, 2026 and PrevailHQ on October 7, 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.*