# Protimeter Firmware Update vs EHS Compliance Hub

The clearest difference is in-app purchases: Protimeter Firmware Update at none against EHS Compliance Hub's 1. Protimeter Firmware Update also leads on iOS requirement (12.0 vs 15.0). EHS Compliance Hub's advantage is update cadence (fortnightly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. EHS Compliance Hub sells 1 one-off in-app purchase. Protimeter Firmware Update asks for nothing beyond the download.

Protimeter Firmware Update ships an update every 4 months, EHS Compliance Hub fortnightly. The most recent releases landed on September 30, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Protimeter Firmware Update | EHS Compliance Hub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Size | 27 MB | 21 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Amphenol-Sensors](https://appshunter.io/developer/1086146573) | [Atmospheric Integrity Management, LLC](https://appshunter.io/developer/6778174954) |

## What reviewers say

### Protimeter Firmware Update

[App page](https://appshunter.io/ios/app/protimeter-firmware-update/id6738372546)

**Features:** macOS Compatibility

**In-app purchases:** none


### EHS Compliance Hub

[App page](https://appshunter.io/ios/app/ehs-compliance-hub/id6784843895)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hub Pro — 30 Days | $9.99 | one-time |


## Frequently asked questions

### Is Protimeter Firmware Update free?

Protimeter Firmware Update is free to download, with no in-app purchases.

### Is EHS Compliance Hub free?

EHS Compliance Hub is free to download, with in-app purchases available.

### Do Protimeter Firmware Update or EHS Compliance Hub have ads?

Neither Protimeter Firmware Update nor EHS Compliance Hub shows ads.

### Which is updated more often, Protimeter Firmware Update or EHS Compliance Hub?

Protimeter Firmware Update ships an update every 4 months, and EHS Compliance Hub fortnightly. Most recently, Protimeter Firmware Update was updated on September 30, 2026 and EHS Compliance Hub on September 26, 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.*