Man, what a great app. I’ve done a lot (days, at least) of research into how to track my hydration, and I’ve downloaded probably a dozen apps. They all suffer from the same shortfall: they only track progress toward a daily goal, which resets at midnight. Hydration is about more than just how much you drink in a day! Just because you hit your daily goal at 3 pm, that doesn’t mean you’ll be hydrated at 9 pm. HiWater is the ONLY app that treats hydration as a continuous process. It gives you a reliable and straightforward estimate of your hydration right now, in addition to the daily intake goal. It gives you reminders as you approach dehydration, not just at random times throughout the day (though it can do that too). Between that feature and their widgets, easy interface, and cross-syncing with their equally awesome caffeine tracking app, I couldn’t be happier with their product. This is one of the best applications I have ever used, and hands-down the best hydration tracker. I cannot give the team enough props.