The Most Useless App I Ever Bought

I need to drink 3 liters of water per day. The app allows only for 8 glasses per day which would force me to drink 375ml per glass! Thats a lot of water. There is no calculator to see how much water a person actually needs, no way to change the number of glasses - 2,59 for this rubbish, I am really annoyed.

Bagehot2012 about Water Break, v1.0