This app is great--probably one of the most useful apps I've downloaded. As an asthmatic and a cyclist, I have to know exactly how much medication I have so I'm not caught unaware (a potentially life-threatening situation). The other day I was out biking and felt wheezy, so I stopped to take a puff, only to find out that my inhaler was empty (believe me: you can't guesstimate how much is left!). I was OK, but that situation was a wake up call. I like this app because you can use it for multiple medicines (a manual counter is available only by prescription, which can get expensive). So glad this came along! Tremendously easy to use.