Cancer survivor-Daughter dyads randomized to the With Love, Grandma ("Con Cariño, Abuelita") group will access a digital lifestyle program that includes 8 modules of didactic, behavioral, and family communication/parenting/grandparenting content from smartphones over the course of 10-12 weeks.

This group is intended to reflect typical services cancer survivors and family members receive from healthcare providers.

Cancer survivor-Daughter dyads will log in to a secured website to access intervention content over a period of 10-12 weeks. The intervention will be delivered primarily through smartphones and will include 8 modules with didactic content on healthy lifestyle behaviors for cancer prevention and control, family behavior change content for setting weekly goals and self-monitoring health behaviors, and family communication and positive parenting/grandparenting content, all of which were developed in accordance with participant feedback based on formative intervention development work. In addition, and to increase participant compliance/reduce attrition often observed in digital health interventions, human support ("supportive accountability") will be provided. Specifically, each family will be assigned a "coach" who will use video conferencing software to engage in weekly 15-30 minute sessions regarding the family's progress throughout the intervention period.

Calculated by percent of enrolled survivor-daughter dyads who completed post-intervention measures

Calculated as number of modules completed (of 8 total modules) by survivors and daughters

Participants will self-report walking and sitting time (hours and minutes per day) using three items from the IPAQ. Mean difference in total time spent walking and sitting will be calculated from these items. The result is not reported in scales. Higher scores indicate higher time spent walking and sitting in the last 7 days.