# ISF Watchkeeper 4 vs EMSA Rulecheck

The clearest difference is iOS requirement: EMSA Rulecheck at 10.2 against ISF Watchkeeper 4's 15.0. 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.

## The numbers

| Metric | ISF Watchkeeper 4 | EMSA Rulecheck |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Monetization | Free | — |
| Size | 39 MB | 13 MB |
| Requires iOS | 15.0 | **10.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [IT Energy](https://appshunter.io/developer/1406834686) | [AG�NCIA EUROPEIA DE SEGURAN�A MAR�TIMA.](https://appshunter.io/developer/1057632331) |

## What reviewers say

### ISF Watchkeeper 4

[App page](https://appshunter.io/ios/app/isf-watchkeeper-4/id1517644023)

This app helps seafarers track and manage their work and rest hours, ensuring compliance with international maritime regulations. It automatically tests timesheets against STCW and MLC 2006, providing real-time alerts for non-conformities and offering a cloud-based solution for easy access and team collaboration.

**Highlights:** Automatic compliance testing, Predictive calculation engine, Real-time alerts and notifications, Live compliance status monitoring, Electronic timesheet signing, Cloud-based collaboration, Offline functionality

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

**In-app purchases:** none


### EMSA Rulecheck

[App page](https://appshunter.io/ios/app/emsa-rulecheck/id1576845355)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ISF Watchkeeper 4 free?

ISF Watchkeeper 4 is free to download, with no in-app purchases.

### Is EMSA Rulecheck free?

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

### Do ISF Watchkeeper 4 or EMSA Rulecheck have ads?

Neither ISF Watchkeeper 4 nor EMSA Rulecheck shows ads.

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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.*