Buddy, a digital app for mental health service users, is being rolled across the UK from today following a successful London-based trial. The smartphone app sends text messages and helps patients with anxiety, depressionFeelings of sadness, hopelessness and a loss of interest in life, combined with a sense of reduced emotional well-being and other mental illnesses to keep a diary of how they are feeling and what they are doing allowing them to pinpoint which behaviours are positive and could help in their journey to recovery.