Week Number · Calendar Weeks

See the current calendar week instantly on iPhone, iPad, the Home Screen, Lock Screen, and Apple Watch.

Week Number gives you one clear answer: what week is it?

Open the app for the current week number, week-based year, date range, and today’s position. Browse earlier or later weeks, choose any date, and share a week when you need to coordinate plans.

AT A GLANCE • See the current week and date range instantly • Follow today across a simple seven-day strip • Browse any week or jump straight back to today

YOUR WEEK SYSTEM • Use ISO 8601 Monday-based week numbering • Or choose Sunday-based numbering • Keep the same rule across the app, widgets, and Apple Watch

WHERE YOU NEED IT • Home Screen widgets on iPhone and iPad • Lock Screen widgets on iPhone • Apple Watch app and complications

PRIVATE BY DESIGN • No account • No ads or tracking • No analytics • Your setting stays on your devices

Week Number is a focused utility for schedules, timesheets, school terms, logistics, planning, and anyone who thinks in calendar weeks.