# ISF Watchkeeper 4 vs Pilot O'clock

ISF Watchkeeper 4 and Pilot O'clock are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

ISF Watchkeeper 4 ships an update every 10 days, Pilot O'clock fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ISF Watchkeeper 4 | Pilot O'clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free | — |
| Size | 39 MB | 26 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [IT Energy](https://appshunter.io/developer/1406834686) | [CIRES TECHNOLOGIES](https://appshunter.io/developer/1548792088) |

## 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


### Pilot O'clock

[App page](https://appshunter.io/ios/app/pilot-oclock/id6504357643)

**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 Pilot O'clock free?

Pilot O'clock is free to download, with no in-app purchases.

### Do ISF Watchkeeper 4 or Pilot O'clock have ads?

Neither ISF Watchkeeper 4 nor Pilot O'clock shows ads.

### Which is updated more often, ISF Watchkeeper 4 or Pilot O'clock?

ISF Watchkeeper 4 ships an update every 10 days, and Pilot O'clock fortnightly. Most recently, ISF Watchkeeper 4 was updated on October 24, 2026 and Pilot O'clock on October 25, 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.*