Health behavior text message content will be delivered daily over 4-weeks to cancer survivor/caregiver dyads.

Inclusion Criteria (survivors and caregivers):

1. ≥18 years old
2. have access to a mobile phone with the ability to receive and send text messages
3. English- or Spanish-speaking
4. free of psychiatric or physical disorders that could interfere with participation (e.g., psychosis, delirium)
5. able to give informed consent in English or Spanish

Survivors must also:

1. have been diagnosed with any solid tumor cancer
2. have completed primary curative treatment at least one month prior to enrollment
3. be able to identify a caregiver to enroll in the study with them
4. report difficulty engaging in dietary quality, physical activity, and/or sleep hygiene behaviors at screening.

Exclusion Criteria:

• Does not meet any of the above criteria