The app works fine if you plan on purchasing water on a regular basis. If you don't plan on purchasing every month (like, for example, you order 5 jugs planning on using them over the next 6 months), the service is very inconvenient. You have to manually skip delivery each month. If you try to change your delivery frequency, you must make a purchase. There is no way around it. I would be much happier if you could change your delivery amount and frequency without having to make a purchase.