A Smart Water Bottle and Companion App (HidrateSpark 3) to Improve Bladder-Filling Compliance in Patients With Prostate Cancer Receiving Radiotherapy: Nonrandomized Trial of Feasibility and Acceptability

William Jin   ^{1, 2} , MD ;   Christopher Montoya   ^{1, 2} , MD ;   Benjamin James Rich   ^{1, 2} , MD ;   Crystal Seldon Taswell   ^{1, 2} , MD ;   Miguel Noy   ² , BS ;   Deukwoo Kwon   ^{3, 4} , PhD ;   Benjamin Spieler   ² , MD ;   Brandon Mahal   ² , MD ;   Matthew Abramowitz   ² , MD ;   Raphael Yechieli   ² , MD ;   Alan Pollack   ² , MD, PhD ;   Alan Dal Pra   ² , MD

¹ Department of Radiation Oncology, Jackson Memorial Hospital, Miami, FL, United States

² Department of Radiation Oncology, Sylvester Comprehensive Cancer Center, University of Miami Health Systems, Miami, FL, United States

³ Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, FL, United States

⁴ Department of Internal Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, United States