Fine but dumb
The app works fine I guess but I played with it and my takeaway was WHY?!?!? Why do I need an app to tell me Im thirsty? If I need a reminder, set a reminder. And the amount of water it recommends is NOT backed by science (there is no consensus) so you may still be over or under hydrating!
KojoKenobi about
Water Tracker: WaterMinder, v3.1