•Black women receiving the smartphone P3 program had more preterm birth knowledge.•Black women receiving the P3 program were more prepared for healthcare decisions.•Black women receiving the P3 program talked more with partners about preterm birth.•Smartphone preterm birth education may overcome clinic-based education barriers.
Keywords: High risk; Minority health; Patient education; Pregnancy; Premature birth; Preterm birth.
© 2024 The Authors. Published by Elsevier B.V.