Onboarding describes some features

Switching to scientific mode

3D touch options on the bottom menu

Drag and drop to save result to memory

Spelling out numbers

Settings and about

Change app icon

Rounding off result using button on top right

Switching to light mode

Onboarding via chat bot

Login screen and onboarding (update)

Onboarding checklist: Add to dock

Coach marks to explain the concept of applets