I haven’t tried it myself but there’s Aquadroid: https://f-droid.org/en/packages/io.github.z3r0c00l_2k.aquadroid/
Hydro Coach might be what you are looking for.
The best is WaterMinder
https://play.google.com/store/apps/details?id=com.funnmedia.waterminder
What would be most efficient?
a.) go to all store and search for “drinking reminder” b.) create a lemmy post to ask what app can remind you of drinking c.) just drink when you are thristy, since we have lived for thousands of years without needing a device to tell us we should drink
Does just drinking when thirsty keep people properly hydrated? I thought I heard the average person doesn’t drink about water.
I think Fitbit app has a drink reminder, but you could use anything that has an activity reminder and make the activity getting up for a drink.