# Permit To Work vs BIGFIRE AIoT

The clearest difference is update cadence: BIGFIRE AIoT at every 8 days against Permit To Work's every 6 weeks. Permit To Work's advantage is iOS requirement (15.0 vs 18.6). 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.

Permit To Work ships an update every 6 weeks, BIGFIRE AIoT every 8 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | Permit To Work | BIGFIRE AIoT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 8 days** |
| Size | 45 MB | 84 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Synergos Systems Company Limited](https://appshunter.io/developer/1777215731) | [BIG FIRE SURVEILLANCE TECHNOLOGY LIMITED](https://appshunter.io/developer/1720073949) |

## What reviewers say

### Permit To Work

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

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

**In-app purchases:** none


### BIGFIRE AIoT

[App page](https://appshunter.io/ios/app/bigfire-aiot/id6755093984)

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

**In-app purchases:** none


## Frequently asked questions

### Is Permit To Work free?

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

### Is BIGFIRE AIoT free?

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

### Do Permit To Work or BIGFIRE AIoT have ads?

Neither Permit To Work nor BIGFIRE AIoT shows ads.

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

Permit To Work ships an update every 6 weeks, and BIGFIRE AIoT every 8 days. Most recently, Permit To Work was updated on October 28, 2026 and BIGFIRE AIoT on October 28, 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.*