How to set the default calendar view?

If you have several calendars, you can choose which one opens when you log in to Tweek and is shown in the widget.

On the web, click your initials in the top right corner, open Settings → General and pick a calendar under Default calendar. The change is saved right away.

In the mobile app, tap your initials, open General and pick a calendar under Default calendar.

The Default calendar option only appears when you have more than one calendar. The default calendar can't be deleted. To delete it, make another calendar the default first.