Lifestyle, Education, Activity, Nutrition (LEAN) Into Pregnancy

Inclusion Criteria: * Patients in a period of preconception who want to become pregnant within 2 years, or patients in their first trimester of pregnancy * English-speaking * At risk for preeclampsia based on the following ACOG criteria: ≥1 high-risk factor: history of preeclampsia, multifetal gestation, chronic hypertension, gestational hypertension, pregestational diabetes, renal disease, or autoimmune disease, OR ≥2 moderate-risk factors: nulliparity, obesity (BMI\>30 kg/m2), family history of preeclampsia, Black or African American race, age ≥35 years, or personal history factors (previous pregnancy low birth weight, previous stillbirth, previous preterm birth, \>10-year pregnancy interval). * At risk for gestational diabetes, defined by ACOG as a BMI \> 25 plus one or more of the following risk factors: physical inactivity, first-degree relative with diabetes, high-risk race/ethnicity (African American, Latino, Native American, Asian American, Pacific Islander), previous infant weight \>4,000g, previous GDM, chronic hypertension, HDL \<35, triglyceride \>250, PCOS, A1c ≥ 5.7, prepregnancy BMI \>40. Exclusion Criteria: * No access to a smartphone * Major fetal anomaly diagnosed during current pregnancy, if pregnant at consent