Background: Physical activity and sleep are interconnected with mental health, physical health, wellbeing, quality of life, cognition, and functioning. Compared to the general population, people who experience psychosis are more likely to have low levels of physical activity, high levels of sedentary behaviour, and sleep problems. Intervention: The Well-Track intervention addresses these issues through: provision of a wearable activity and sleep tracker (Fitbit); physical activity and sleep hygiene advice; a brief motivational interview; a goal-setting workbook; and three engagement, feedback and discussion sessions with early intervention in psychosis (EIP) staff. Participants: Thirty participants using an EIP service took part in an eight-week intervention. Thirteen participants (6 males; 7 females) with an age range of 18 to 61 years old (M = 28 years) took part in an interview. Methods: A qualitative approach was used to conduct in-depth semi-structured interviews. Thematic and content analyses were employed to analyse the data. Results: Participants set goals, made lifestyle changes to their daily routine and integrated a Fitbit and its functions into their lives that resulted in more physical activity and enabled more effective sleep. This resulted in improved self-management, positive feelings and thoughts, motivation, confidence, social engagement, mood, health, and wellbeing. Participants made progress towards goals they had set. Conclusion: Well-Track has been successfully integrated into an EIP service and it could be delivered through all EIP and other healthcare services where there is a need to promote healthy lifestyle behaviours.