Watery: Water Tracker & Hydration Tracker Watery is a simple water tracker, hydration tracker and water log in one. It turns “drink more water” into a daily water intake goal you can actually hit. Set your weight, activity level and wake and sleep times once. Watery calculates your daily water goal, then keeps score as you track water in millilitres or fluid ounces, with quick-add buttons for a glass or a bottle, or a full manual entry.