An interlude is a sequence of activities. You just have to set the interlude duration, and Interlude will suggest activities relevant to the time you have.
The interlude ends automatically when you run out of time.
Interlude Premium unlocks all the features and activities of Interlude.
Additional features include the ability to set a custom frequency to activities, so that you can keep only your favorite activities.
With Interlude Premium, you get access to activities where you are asked to solve a jigsaw puzzle, build a tower by stacking blocks, guess a sequence using a trial-and-error approach, and more.