The "8 glasses" problem.
For decades, the standard hydration advice has been: "drink 8 glasses of water a day." However, sports and medical science has proven that a one-size-fits-all rule is outdated. A 50kg sedentary office worker in a temperate office needs vastly different hydration than a 90kg athlete training in hot weather.
Our mission is to replace myths with calculation. We translate complex medical formulas into a simple, responsive, and beautiful utility that gives you a personalized, actionable plan.
Our scientific foundations.
We do not invent hydration numbers. Our calculation model integrates guidelines established by leading organizations:
Institute of Medicine (IOM)
Defines the adequate fluid baseline guidelines (3.7 liters total fluids daily for men, 2.7 liters for women).
World Health Organization (WHO)
Identifies temperature and climate adjustments (+20% in warm climates, up to +35% in hot weather) to counter sweating loss.
American College of Sports Medicine (ACSM)
Sets sports standards, recommending adding approximately 500ml of fluid per 30 minutes of exercise duration to match body sweat rate.
Privacy first. Ads second (or never).
We believe that utilities should be fast, minimal, and respect user privacy. That is why our site has no signup walls, stores all tracker logs locally in your browser, and runs offline.