# CANManage by CCOHS vs GreenBook

The clearest difference is iOS requirement: GreenBook at 13 against CANManage by CCOHS's 15.5. 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.

CANManage by CCOHS ships an update every 4 months, GreenBook every 3 months. The most recent releases landed on September 14, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | CANManage by CCOHS | GreenBook |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 32 MB | 26 MB |
| Requires iOS | 15.5 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Canadian Centre for Occupational Health and Safety](https://appshunter.io/developer/1031111931) | [Tanner Mackenzie](https://appshunter.io/developer/1782692965) |

## What reviewers say

### CANManage by CCOHS

[App page](https://appshunter.io/ios/app/canmanage-by-ccohs/id6468667349)

**Features:** macOS Compatibility

**In-app purchases:** none


### GreenBook

[App page](https://appshunter.io/ios/app/greenbook/id6738869708)

Access Ontario's Occupational Health and Safety Act and Regulations. This tool allows for easy searching, bookmarking, and highlighting of key passages to aid in workplace compliance. A downloadable safety board posting is also available.

**Highlights:** Access Ontario's Health and Safety Act, Searchable Regulations, Bookmark key passages, Highlight text, Global search across documents, Downloadable safety board posting

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CANManage by CCOHS free?

CANManage by CCOHS is free to download, with no in-app purchases.

### Is GreenBook free?

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

### Do CANManage by CCOHS or GreenBook have ads?

Neither CANManage by CCOHS nor GreenBook shows ads.

### Which is updated more often, CANManage by CCOHS or GreenBook?

CANManage by CCOHS ships an update every 4 months, and GreenBook every 3 months. Most recently, CANManage by CCOHS was updated on September 14, 2026 and GreenBook on June 1, 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.*