This application calculates the number of the week for any date in the past and the future. It can either use the US method (first day of week is a Sunday) or the ISO method (first day is a Monday, first week contains the first Thursday of the year).

It updates the icon badge to the current week number on each start.

What’s New

Version 1.4.0

- support for the iPad multitasking (split view..)
- support for iPhone 6, 6+ and iPad Pro

Ratings and Reviews

Farfromvergnugen ,


The week number displayed in the icon is static. It does not show the current week number. The current week number is only displayed when you open the app. There is also no close button on the app screen, so one must use the home button to minimize, and close the app by swiping. Features and function are inconvenient. Unless updates correct the icon display (fatal flaw in my opinion), I recommend against purchasing this app.



The description says "calculates the number of the week for any date in the past or future." The sentence should say "calculate the number of the week for any YEAR!" I bought this thinking it could keep track of my newborns age/week. My son is 18 weeks now and it would be nice to have an App that would count the weeks staring on his B-day. Wasted my 99 cents.

janoeterm ,

Does not update

The thing has the number on the icon but it does not update. I.e. I click on it, enter today's date (should be automatically) and the week number goes to the correct number. Hit the home button, and wallaa, the icon still shows the old week number. Change between US and ISO, still no update of icon. I uninstalled the thing.


Piet Jonas
662.5 KB
Requires iOS 5.1.1 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2009 Piet Jonas


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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