I like that they have different apps for both Android as well as iOS users, which makes it easier to use their app with an iPhone or iPad without having to download two separate applications.
The accuracy of their measurements can be very good when you are using them correctly, but sometimes there are issues where I get inaccurate results (especially if my skin tone isn't exactly what they expect). If your looking into getting some great quality fitness tracking devices then this one should definitely be at least considered! Tracking steps taken, calories burned, distance walked/run, sleep patterns, etc.