Using your cell phone for centering prayer

Well that sounds like a joke doesn't it? Isn't the cell phone the symbol of all that so completely distracts us from our life of prayer? Well, I figured out a way to use it so that it helps me! I'm not one of those people, like my husband, who wears wrist watches with all kinds of doodads. As far as watches go, I'm strictly analog. But that means I never have any kind of alarm handy, and so that means that one sneaks looks at the time, when one has set oneself 15 or 20 minutes for centering. Then I realized that my cell phone has an alarm that is easy to use. So now, I can just sit patiently and not worry that I will "overpray." (Not likely!) Of course, this wouldn't work so well if you get frequent calls (I'm not sure if you can turn off the rings and still have the alarm) but since I don't, it's good!