Comparison

Voly | Workrest vs ISF Watchkeeper 4

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Voly | Workrest

Streamline crew management at sea with tools for logging rest hours, submitting leave requests, and tracking compliance. Collaborate in real-time with vessel managers and fellow crew members, whether online or offline.

Highlights
  • Log hours of rest
  • Create work profiles
  • Submit shore leave requests
  • Set In | Out status
  • Monitor rest hour compliance
  • Offline functionality
  • Real-time collaboration
Features
Read full description

Simplify your life at sea with the next generation of crew management tools. Thousands of crew on vessels worldwide use workrest to win back time from tedious admin tasks to get back to what they do best. The workrest app syncs seamlessly with workrest’s Vessel Dashboard to give captains, crew and vessel managers the ability to collaborate in real-time and benefit from more productive teamwork. Win back time for more important things: * Log hours of rest for multiple days at a time, on or offline. * Create work profiles to log regular hours in a fraction of the time * Submit a shore leave request directly through the app * Set your In | Out status with one click Stay on top of the important stuff: * Monitor your hours of rest compliance (MLC) * Set reminders to log your hours * Get notified of shore leave approvals * Review your upcoming shore leave dates * View the live status of your fellow crew Don’t let anything hold you back: * Works on and offline * Keep your personal workrest profile when you move vessels Ready to get started? Download the workrest app. Select sign up and create your account in seconds. Then invite other crew to join directly through the app.

About

ISF Watchkeeper 4

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
Read full description

ISF Watchkeeper 4 mobile app enables seafarers to record their work and rest hours on smartphone and tablet. Timesheets are automatically tested against STCW, MLC 2006 and other international and local regulations for compliance purposes. The predictive calculation engine helps manage work and rest hours compliance for you, keeping you notified of up coming non-conformities and helping you remain compliant. Cloud-based and totally cross platform, ISF Watchkeeper 4 provides seafarers with an efficient yet simple mobile solution that is full of great innovations, showing live compliance status, allowing real time tracking and testing, whilst making it easy to log hours of work and rest, and plan-ahead to avoid regulatory breaches. - Works on or offline - Syncs to ISF Watchkeeper 4 Web App for real-time collaboration across teams - Realtime alerts and notifications of upcoming non-conformance - Monitor your live Compliance Status - Electronic timesheet signing and verification - Manage your work schedules - Automatically log hours by your work schedule - Manage vessel joining and leaving - Copy logged hours across multiple days - Reporting Dashboard - Cloud based, no vessel installation required - Simple, intuitive User Interfaces A truly global brand, accepted by Port State Control and recognised as the gold standard work and rest hour solution, ISF Watchkeeper is developed in partnership with the International Chamber of Shipping (ICS), whose members include over 80 percent of the global merchant fleet and who have represented the industry at the International Maritime Organization (IMO) and International Labour Organization (ILO) for more than 50 years. No more printing: you can electronically sign and lock timesheets and have them available on your mobile or online for inspection as per IMO guidelines for the signing, tracking and verification of electronic certificates. Your data is synced to the cloud and accessible via the ISF Watchkeeper 4 web app, offering seamless team collaboration and powerful management and reporting functionality from the shore. Furthermore, our dedicated support team are on hand to assist at every turn, getting you up and running and ensure your software operation runs smoothly. The app is packed full of innovative features, benefitting from constant development and evolution by working alongside professionals in the industry and harnessing the decades of experience working extensively in the shipping industry. ISF Watchkeeper 4 is the smart way to help operators comply with the requirements of the ILO (MLC, 2006) and IMO International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW).

Screenshots

Voly | Workrest4 screens
ISF Watchkeeper 44 screens

Verdict

The call

The clearest difference is review sentiment: Voly | Workrest at 67% against ISF Watchkeeper 4's 50%. ISF Watchkeeper 4's advantage is monetization model (free vs ad-supported) and update cadence (every 10 days vs every 3 weeks). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Voly | Workrest ships an update every 3 weeks, ISF Watchkeeper 4 every 10 days. The most recent releases landed on September 3, 2026 and September 10, 2026 respectively.

Scorecard3 real differences · 7 level
Voly | Workrest versus ISF Watchkeeper 4: the parameters behind the verdict, then further details
ParameterVoly | WorkrestISF Watchkeeper 4
PriceFreeFree
Rating4.0 (3 ratings) — better—
Positive reviews66.7% of reviews — better50.0% of reviews
Number of ratings3 — better—
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size55 MB40 MB
Age rating4+4+
DeveloperVoly GroupIT Energy

Customer experience

Voly | Workrest

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

ISF Watchkeeper 4

Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Voly | Workrest

No in-app purchases

None

ISF Watchkeeper 4

No in-app purchases

Questions

Is Voly | Workrest free?
Voly | Workrest is free to download, with no in-app purchases.
Is ISF Watchkeeper 4 free?
ISF Watchkeeper 4 is free to download, with no in-app purchases.
Do Voly | Workrest or ISF Watchkeeper 4 have ads?
Neither Voly | Workrest nor ISF Watchkeeper 4 shows ads.
Which is updated more often, Voly | Workrest or ISF Watchkeeper 4?
Voly | Workrest ships an update every 3 weeks, and ISF Watchkeeper 4 every 10 days. Most recently, Voly | Workrest was updated on September 3, 2026 and ISF Watchkeeper 4 on September 10, 2026.

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