Build your own reminder schedule — medications, catheterization, bowel program, pressure relief, stretches, appointments — then add it to the calendar on your phone or computer. It's free, and everything is created right in your browser: nothing you type is sent anywhere or saved.
The download path keeps your alerts the most reliable, because the events become normal entries in your own calendar.
Tap Download, then open the downloaded .ics file (it may open automatically, or find it in the Files app or your Downloads). Tap it, choose a calendar, and tap Add All. To make sure alerts sound, check Settings → Apps → Calendar → Default Alert Times, and keep your phone's notifications on.
Easiest on a computer: go to calendar.google.com → gear icon → Settings → Import & export → Import, choose the downloaded .ics file, and pick which calendar to add it to. It will then sync to your phone.
Need to change your schedule later? Just rebuild here and import again — matching reminders update rather than duplicate.