Initial phase: Set up your favourite languages.
Scenario no. 1: You open the app. You look up a word and you find its definition, in more than one language (you decide!). The app has done its job.
Scenario no. 2: You're reading a difficult book. You flip the page, knowing that what follows are a bunch of unknown words. You take a photo of the page, and when you need a word's definition, you just tap the word. Job done!
Scenario no. 3: You wish to learn a new word daily. For this, the app provides you with the "Today's Words" section. You may also receive a daily notification to remind you of these!