# OHSA vs Permit To Work

The clearest difference is iOS requirement: OHSA at 9.0 against Permit To Work's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

OHSA ships an update every 4 months, Permit To Work every 2 months. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | OHSA | Permit To Work |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 8 MB | 44 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [上海欧萨数据技术有限公司](https://appshunter.io/developer/1146355393) | [Synergos Systems Company Limited](https://appshunter.io/developer/1777215731) |

## What reviewers say

### OHSA

[App page](https://appshunter.io/ios/app/ohsa/id1601786365)

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

**In-app purchases:** none


### Permit To Work

[App page](https://appshunter.io/ios/app/permit-to-work/id6740983600)

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

**In-app purchases:** none


## Frequently asked questions

### Is OHSA free?

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

### Is Permit To Work free?

Permit To Work is free to download, with no in-app purchases.

### Do OHSA or Permit To Work have ads?

Neither OHSA nor Permit To Work shows ads.

### Which is updated more often, OHSA or Permit To Work?

OHSA ships an update every 4 months, and Permit To Work every 2 months. Most recently, OHSA was updated on October 9, 2026 and Permit To Work on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*