Comparison

ISF Watchkeeper 4 vs XLSX Sheets

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

Head to head
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).

About

XLSX Sheets

Create, edit, and manage Excel-compatible spreadsheets on your mobile device. Offers powerful editing tools, formula assistance, data visualization, and collaboration features. Work offline and import/export data in various formats.

Highlights
  • Edit, create, and manage XLS sheets
  • Excel-compatible formula builder
  • Data visualization tools
  • Real-time collaboration
  • Advanced data analysis
  • Offline access
  • Import/export data
Features
Read full description

Powerful & Easy XLSX Editing at your fingertips: Tired of bulky spreadsheet software that limits your mobility? Introducing XLSX Sheets, your all-in-one mobile solution for creating, editing, and managing Excel-friendly Spreadsheets and Smartsheets with unmatched ease and efficiency. Effortlessly manage data at your fingertips, anywhere, anytime: • Edit with precision: Utilize a comprehensive suite of editing tools for Excel-compatible spreadsheet control. Cut, copy, paste, format cells, and apply Excel-compatible formulas seamlessly. • Formula mastery made easy: Access a library of easy-to-advanced Excel compatible functions and receive real-time formula suggestions as you type, ensuring error-free calculations. • Visualize your success: Effortlessly create and manipulate charts and graphs in both spreadsheet and Smartsheet files, gaining clear insights from your data. • Real-time sheet collaboration: Work seamlessly with colleagues or classmates by sharing spreadsheets and xls through popular cloud services like Google Drive, Dropbox, and OneDrive. Your perfect spreadsheet companion: • Analyze advanced data: Leverage powerful tools to sort, filter, and create pivot tables, extracting valuable insights from your sheets. • Streamlined compatible workflows: Utilize Excel-compatible templates for tasks like budgeting, to-do lists, accounting, and financial analysis, saving you valuable time and effort. • Seamless data exchange: Import data from various sources, including CSV files, web tables, and other XLS files, ensuring compatibility across platforms. Export or convert your sheet to formats like PDF, CSV, or XLS for maximum flexibility. Sheets tailored for your unique needs: • Personalize your experience: Choose from customizable themes, cell styles, and conditional formatting options to make your spreadsheets visually appealing and functional. • Work offline, uninterrupted: Continue working on your spreadsheets even without an internet connection. Offline sheet access ensures you have control over your data, wherever you are. • Customer support: Enjoy regular xls updates and top-notch customer support to keep your editing experience smooth and efficient. Whether you are a business professional, student, or simply someone who needs to manage data on the go, XLSX Sheets is the perfect tool for you. Download it today and experience the power of mobile spreadsheets! Key features: • Edit, create, and manage XLS sheets and Smartsheets • Powerful excel compatible formula builder with real-time suggestions • Comprehensive data visualization tools (charts, graphs & pivots) • Real-time spreadsheet collaboration through cloud integration • Advanced data analysis features (sort, filter, pivot tables, budget calculations) • Modern templates for various tasks (budgeting, accounting, reporting, etc.) • Import and export data in various formats (CSV, PDF, XLS) • Customizable themes, cell styles, and formatting options • Offline spreadsheet access for uninterrupted work • Regular updates and dedicated customer support Download XLSX Sheets today and start working smarter, not harder! Weekly/Monthly/Yearly subscriptions available. Choose the plan that best suits your needs. Cancel anytime. Subscription will be charged to your credit card through your App Store account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. Manage your subscription in the Account Settings on the App Store after purchase. Terms of use - https://sites.google.com/a1apps.co/tc-xlsx-sheets-ios/home Any feedback is welcomed at p3@a1apps.helpscoutapp.com

Screenshots

ISF Watchkeeper 44 screens
XLSX Sheets4 screens

Verdict

The call

The clearest difference is in-app purchases: ISF Watchkeeper 4 at none against XLSX Sheets's 10. ISF Watchkeeper 4 also leads on review sentiment (50% vs 22%) and update cadence (every 10 days vs monthly). XLSX Sheets's advantage is chart position (#153 vs unranked). On price, ads, device support and iOS requirement 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. XLSX Sheets sells 10 in-app purchases, starting at $1.99 per month. ISF Watchkeeper 4 asks for nothing beyond the download.

UpkeepUpdate frequency

ISF Watchkeeper 4 ships an update every 10 days, XLSX Sheets monthly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 6 level
ISF Watchkeeper 4 versus XLSX Sheets: the parameters behind the verdict, then further details
ParameterISF Watchkeeper 4XLSX Sheets
PriceFreeFree
Rating—4.6 (3.3K ratings) — better
Positive reviews50.0% of reviews — better22.3% of reviews
Number of ratings—3.3K — better
Update frequencyEvery 10 days — betterMonthly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#153 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size39 MB222 MB
Age rating4+4+
DeveloperIT EnergyRhophi Analytics LLP

Customer experience

ISF Watchkeeper 4

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

XLSX Sheets

All ratings3,279 ratings
Positive88.7%
Neutral3.2%
Negative8.1%
Written reviews112 reviews
Positive22.3%
Neutral0.9%
Negative76.8%

Bugs and requests

ISF Watchkeeper 4

Not enough reviews yet to summarise bugs or requests.

XLSX Sheets

Reported bugs

2 issues
  • App crashes on launch
  • Unable to open or edit files

Requested features

2 requests
  • Option to cancel subscription
  • Improve stability and performance

In-app purchases

None

ISF Watchkeeper 4

No in-app purchases

10 purchases

XLSX Sheets

Subscriptions10
  • Pro Monthly Plan$1.991 Month
  • Premium Monthly$4.991 Month
  • Pro Weekly3 Days trial$5.997 Days
Show 7 more
  • Premium Monthly$6.991 Month
  • Premium Weekly7 Days trial$7.997 Days
  • Premium Weekly3 Days trial$7.997 Days
  • Pro Weekly Plan7 Days trial$7.997 Days
  • Pro Weekly3 Days trial$9.997 Days
  • Premium Monthly$12.991 Month
  • Premium Yearly3 Days trial$29.991 Year

Questions

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

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