Onboarding describes some features

3D touch options on the bottom menu

Switching to scientific mode

Drag and drop to save result to memory

Change app icon

Settings and about

Rounding off result using button on top right

Spelling out numbers

Change app theme color

Onboarding checklist: Groups

Set bedtime during onboarding

The onboarding asks you select a language and pick a daily learning goal

Login and onboarding. Setting up profile and interests