Optimization of Remotely Delivered Physical Activity Intervention for Breast Cancer Survivors

The core intervention will include educational materials, access to a basic smartphone app and a Fitbit.

Participants will receive 6 bi-weekly phone calls from study staff.

"Participants will receive deluxe version of smartphone app with additional features."

Participants will receive access to online exercise videos.

Participants will receive motivational app notifications

Participants will choose a buddy to receive a Fitbit and support them during the intervention.