Hey /adv/, I'm looking to actually take care of my body

What are you talking about? I just clicked a random one after searching 'water drinking' in the Google Play Store and it gives you reminders

>>18571715
https://www.amazon.com/Inspirational-Bottle-Marker-Measurements-Positive/dp/B01NALLECK/ref=sr_1_3?ie=UTF8&qid=1501397851&sr=8-3&keywords=water+bottle+time

It literally tells you what time you should drink on the bottle.

>(you're already experiencing dehydration when you feel thirsty)
That's a myth, dude. A reduction of one or two percent in your body's water is usually enough to make you feel moderately thirsty. When that happens you go drink water and gain that percent back. What people call """dehydration""" (i.e. you've lost enough water that you start feeling sluggish, urinating and sweating less, you're putting yourself at risk for things like kidney stones and damaging your overall health) doesn't set in until you've lost around 5% of your body's water content, and unless you have some kind of condition you'll feel thirsty long before that, guaranteed.

You also don't need to drink eight glasses a day, I hope you realize that. That's another myth.

I have to watch my water intake very carefully because I'm genetically predisposed to get kidney stones, which hurt like hell. I don't have any apps to recommend, sorry, but in my opinion the easiest way is just to always pay attention to what your pee looks like. When you pee, it should be pale yellow. If it's darker than that, then go and drink a glass of water (or two) right away.