Water tracking is here.
Log a glass (250 ml) or a bottle (500 ml) with one tap from the Today screen, or type any amount. Your daily goal is worked out from your weight and activity level — set your own instead from Profile at any time.
Progress now charts water next to your calories, across 7, 30 or 90 days.
There's an optional afternoon reminder too. It stays quiet on days you've already reached your goal.