wotto is a small otter with exactly one wish: that you drink enough water. he used to live only on macs. now he fits in your pocket. he floats at the bottom of your screen — tip your phone and the water stays level with the real world, sloshing a little before it settles. log a glass and he does a happy little drink. hit your daily goal and he hands you a flower. no arguments. — a glass overdue? wotto surfaces on the dynamic island until you've had it — widgets for your home screen and lock…