# ESA ON Mobile vs GreenBook

The clearest difference is review sentiment: GreenBook at 100% against ESA ON Mobile's 0%. GreenBook also leads on update cadence (every 3 months vs every 7 months) and iOS requirement (13 vs 16). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ESA ON Mobile ships an update every 7 months, GreenBook every 3 months. The most recent releases landed on September 22, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | ESA ON Mobile | GreenBook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/esa-on-mobile/id1670707784/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 3 MB | 26 MB |
| Requires iOS | 16 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Electrical Safety Authority](https://appshunter.io/developer/1117045471) | [Tanner Mackenzie](https://appshunter.io/developer/1782692965) |

## What reviewers say

### ESA ON Mobile

[App page](https://appshunter.io/ios/app/esa-on-mobile/id1670707784)

This app allows Electrical Safety Authority account holders to manage wiring inspection notifications. Users can schedule inspections, check status, and submit photo/video evidence of installations directly to the ESA. It requires an ESA Online Services account to use.

**Highlights:** Schedule wiring notifications for inspection, Check inspection status and inspector information, Capture and submit photo/video evidence, Offline photo/video capture, Log in with ESA Online Services credentials

**Features:** Vision Pro support

**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 ESA ON Mobile free?

ESA ON Mobile is free to download, with no in-app purchases.

### Is GreenBook free?

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

### Do ESA ON Mobile or GreenBook have ads?

Neither ESA ON Mobile nor GreenBook shows ads.

### Which is updated more often, ESA ON Mobile or GreenBook?

ESA ON Mobile ships an update every 7 months, and GreenBook every 3 months. Most recently, ESA ON Mobile was updated on September 22, 2026 and GreenBook on September 23, 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.*