Know which week it is

A small home-screen widget for iOS and Android. ISO 8601 week number, updates with the calendar, no ads or tracking.

Download GitHub

What you get

ISO 8601 weeks start on Monday, with an optional Sunday-start mode on iOS.
Home and lock screen on both platforms.
Light and dark follow system theme on Android; customizable on iOS.
Native code SwiftUI + WidgetKit on iOS, Kotlin on Android.
MIT licensed and free to use.

Install

iOS

Requires iOS 17 or later.

App Store listing coming soon.

Build from GitHub

Android

Requires Android 8.0 (API 26) or later.

Google Play listing coming soon.

Build from GitHub

For developers

Clone WeekNumber-Widget, open ios/ in Xcode or android/ in Android Studio, and run on a device or emulator. Week calculation matches ISO 8601 in both apps.