Seriously, this is a disease-specific software question. I'm an otherwise healthy 54-year-old male, recently diagnosed with muscle-invasive bladder cancer. It was caught early (GET MEDICAL CHECKUPS REGULARLY!) so the big picture is optimistic. But I'm likely to undergo soon what's called radical cystectomy and neobladder reconstruction, meaning the entire bladder is surgically removed and replaced with one rebuilt out of a piece of my intestines. If so, I'll need to replace the lost function of nerve signalling by urinating on a timed schedule, at intervals of no longer than X hours around the clock, with X lengthening to about 4 as the neobladder heals and stretches. (As Morgan Freeman pointed out in Driving Miss Daisy, like everyone else I know when my original-equipment bladder is full, even while sleeping. But without some kind of chronometer I won't know when my neobladder's full. Nightime incontinence is a common side effect.) It occurred to me that wearing an Apple Watch at all times might be helpful with that, particularly with getting awakened by alarm without waking my wife. I know there are numerous alarm apps that can be set to go at specific times and either sound an alarm or vibrate at those times. Those would be helpful but not ideal. Ideally, the app would function like an hourglass. The maximum urination interval "X" would be held in memory, and could be reset from month to month as appropriate. Each time I urinate, I would tell the watch (or linked iPhone) to reset the alarm to give me another X hours. An app in which that information entry would require very few taps would be best. Ideally, the watch would vary the initial alarm mode (from sound to vibrate) depending on time of day/night, and escalate the alarm if I didn't respond to it. Beyond ideally (I don't expect to find this now but maybe an app developer will read this here) the app would integrate information on environment and body temperature and activity level, and accept inputs on fluid intake, so that it could vary "X" based on a model predicting how much urine would have reached the neobladder. I currently own an iPhone but not an Apple Watch. If anyone has an app to recommend, I'd like to test it out on the phone and maybe buy a watch soon to get used to wearing and using it. Suggestions?