Randomized Controlled Trial of Two Mobile Health Strategies to Manage Postpartum Hypertension

This study compares two smartphone-based approaches to help new mothers manage high blood pressure after delivery. Postpartum high blood pressure (including preeclampsia) can be dangerous, and this study tests whether text message-based monitoring or a dedicated app leads to better blood pressure control. **You may be eligible if...** - You are 18 or older and gave birth within the last 14 days - You were diagnosed with preeclampsia or gestational hypertension during pregnancy or after delivery - You were started on blood pressure medication before leaving the hospital or within 14 days of delivery - You speak English or Spanish and can read and understand instructions - You have a phone capable of sending and receiving text messages **You may NOT be eligible if...** - You had high blood pressure before your pregnancy (chronic hypertension) - You have pre-existing heart disease, kidney disease, or other serious cardiovascular conditions - You do not have access to text messaging Talk to your doctor to see if this trial is right for you.