This is a really nice and well designed app. It functions exactly how it is described, and has a degree of flexibility which I didnt expect in such a minimalist tool. You can adjust the timer to various input defaults, or to any measurable point within a tolerance level most people will not require to be more precise. You can opt to have it beep (or not) buzz (or not) vibrate, etc. when the timer expires. You can remove chunks of time in preset amounts as well, and there is a respectable level of further adjustments that can be made within the tool. But the signature feature here is design. The interface is so perfect that it appears to have been brought to us by Apple. Intuitive and understated, the rheostat design is elegant to the point of being zen. I hope the developer continues to work at making more of this type of wonderful, functional app.