The Even / Odd app for iPhone
Know whether it's an even or odd week without opening a browser — or even unlocking your phone. The app is free, works offline and shows no ads.
Even / Odd
iPhone · iOS 17+ · English, Français, Deutsch, Nederlands
What does the app do?
Same principle as this website: pick a date, the app tells you whether its ISO 8601 week is even or odd and shows that week's start and end dates. The difference is speed — the answer lives on your phone, always at hand.
The home screen widget
This is the app's standout feature. Add the widget to your home screen and the current week number, with its even / odd status, stays visible at all times. Nothing to open — one glance is enough. The widget refreshes automatically every Monday at midnight.
Custom labels
You don't have to think in terms of "even" and "odd". Replace those words with whatever makes sense to you: "Dad" / "Mum", "My place" / "Their place", the children's names… The app and the widget then show your label directly. Up to 15 characters, just like on the site.
Built for shared custody
Week-on, week-off arrangements almost always run on even and odd week numbers. The app removes the last bit of doubt: no more counting, checking a calendar, or wondering what happens at the turn of the year. The widget answers the question before you even ask it.
What the app does
- Even or odd week for any date, past or future
- Home screen widget with the current week, refreshed every Monday
- Custom labels instead of "even" / "odd"
- Fully offline: no connection required
- Free, no ads, no account
- Available in English, French, German and Dutch
- ISO 8601 calculation (week runs Monday to Sunday)
Frequently asked questions
Is the app free?
Is there an Android version?
Does it work without a connection?
How is it different from the website?
Download Even / Odd
Free on the App Store
