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Week number calculator with support for Apple Watch, notification center widget, icon badge and calendar events all in one app!

– ISO standard or US week numbers
– Easy conversion between dates and week numbers
– Go back and forth through weeks with selectable number of weeks per tap
– Customizable widget
– Apple Watch support
– Add week numbers as calendar events

You can choose between one or more systems for week numbering:
-ISO 8601 system (Week starts on Monday. Used in most European countries)
-US system (Week starts on sunday)

With the Week/Date calculator, you can:
– Choose a week number and see the dates
– Choose a date and see the week number
– Switch between weeks in selectable step (4 weeks per click etc)

Widget requires iOS 8. To activate the widget, do the following:
1 Unlock the device
2 Pull down from the top of the screen to open the notification center.
3 Tap "Edit" at the bottom.
4 Press the green + sign next to "forecast".

The app can display the week number of the current week as an icon badge. (Icon badge can follow another numbering system than the one that you have added to your calendar)

Week numbers can be added as an additional calendar in iOS's integrated calendar app, or as an event on the first day of each week in the default calendar on your iPhone/iPad.

This app does not use subscribed calendars that stops updating itself. Everything is stored on your iPhone/iPad, in iCloud or in the calendar with your email provider.

It could not be easier!

App of the day at on March 11th, 2014:
"Performs a simple and basic function that can be very handy"
If you experience problems with adding week numbers or have any questions, please check out the app's FAQ on the support page!

Should you experience any problems or have any questions or suggestions I welcome your feedback to

You are allowed to use this product only within the laws of your country/region. SharewareOnSale and its staff are not responsible for any illegal activity. We did not develop this product; if you have an issue with this product, contact the developer. This product is offered "as is" without express or implied or any other type of warranty. The description of this product on this page is not a recommendation, endorsement, or review; it is a marketing description, written by the developer. The quality and performance of this product is without guarantee. Download or use at your own risk. If you don't feel comfortable with this product, then don't download it.

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