TrueBlue is an app that can help measure and monitor depression. It will be used in a clinical study in the UK, with pregnant women and women that have recently given birth. On a weekly basis the app will ask users to record video of their face whilst they undertake a simple reading or talking task. It will also ask users to fill in (clinically validated) questionnaires and present the results back to the user.This app is for pre-registered users, that have already signed the consent form, only.