Good idea, but who would turn down the chance to get another dedicated app?
Especially if you have a job that already involves walking all day. The stand reminder won't help at all in those cases.This serves a better purpose for trips:
Carribean or S. American travellers that have never been to such hot climates,
Egyptian or desert travellers, first try?
Those training for their first half/full marathon.
Remember many MANY people don't drink nearly enough water per day - even in the winter it's critical and yet so difficult. It's helpful to retrain your brain into good habits.