This study will evaluate the feasibility and effectiveness of a two-session psychologist-led behavioural activation intervention, with adjunctive use of a free activity/goal setting app, for depressed patients in primary care. Outpatients in primary care with Major Depressive Disorder will be recruited to complete two intervention sessions with the primary care psychologist, as well as use the mobile activity scheduling app for 6 weeks. Symptom measures will be administered prior to both intervention sessions and 6-weeks after the first intervention session.