HETA

HETA, or Happiness Enforcement Therapy Application, is an app designed to help you stay happy indefinitely. Using a technology previously thought impossible, HETA will periodically scan your face through your front-facing camera, and play an ear-splitting whining sound if we detect you aren't maintaining a high degree of happiness. The audio-visual reminders will help to ensure that you never forget to be happy again!

(Note: I am not a licensed psychiatrist and you are not allowed to sue me)