We're planning to create a toggle in the app settings that will enable displaying Week numbers, but in the meantime, you need to add the Week number calendar manually.
If you're using Google Calendar, you should subscribe to the Week Numbers calendar.
For this, please do the following:
- Open Google Calendar website.
- Tap on the arrow next to Other Calendars.
- Choose Browse Interesting Calendars.
- Tap More and Subscribe to the Week Numbers calendar.
In case you're using only local calendars, you'll have to do the following on your iOS device:
- For the US Standard Week Number calendar, follow this link; for the Europe/ISO Standard Week Number calendar, tap here.
- Tap Subscribe to Calendar and confirm your choice.
- After this, press Done.