The home-screen widget
Add the Moodbow widget from your phone's widget picker. Tap a face to open Moodbow with that mood already picked; nothing is saved until you tap Save. After you check in, the widget shows Checked in with today's face.
The widget never shows anything you wrote. If App lock is on, the faces still show before you check in; after you check in, it shows only Checked in, with no face or mood word. Opening Moodbow asks for your PIN first.
The widget uses the language you chose in Moodbow.