Elizabeth Y. Wang, Benjamin N. Breyer, Austin Lee, Natalie Rios, Akinyemi Oni-Orisan, Michael A. Steinman, Ida Sim, Stacey A. Kenfield, Scott R. Bauer. MP28-03 PERCEPTIONS OF OLDER MEN USING A MOBILE HEALTH APPLICATION TO MONITOR LOWER URINARY TRACT SYMPTOMS AND TAMSULOSIN ADVERSE EFFECTS: MIXED-METHODS STUDY. Investigative Urology. 2021 Sep 1; 206(Supplement 3).