iOS - autocomplete text has the same typeface and style as the underlying text field
/via Idan Gazit
Foursquare iOS app - if you drag your uploaded photo to the left, you see a hidden mascot holding a camera.
Pinterest iOS app - Scrolling down hides the top bar and scrolling up makes it appear again.
iOS - The feature Speak Selection (on Settings > General > Accessibility) shows the characters of the fable The Tortoise and the Hare for the voice speed settings.
/via Victor Boaretto
Foursquare - In the iOS notification settings, the option to include adorable puppy photos in weekly updates is given.