Very easy to use. This stopwatch displays on your screen whatever the application you are using. It is always on top ! You just move it where you want on the screen. Once displayed, just tap once to start or pause, and double tap to reload. To hide, just go back to the app and press the button again, or slide it to the right of the screen. Notice: Ideal for speeches, cooking, JW meetings, ... This version is financed by advertisement. You can buy definitive pro version (no ad) or watch a sho