Not high-tech, but so handy!
The Time Timer is a visual timer that is great for students, for me, and for anyone often loses track of the time, or as we prefer to call ourselves,”chronometrically impaired.”
Since the red fraction of the disk shrinks as time passes, even a child who cannot tell time or read numbers can read it. (One hour is a full circle, 30 minutes, a half-circle, 15 minutes, a quarter circle, and so on.) We love this for studying, practicing, and more. I keep one on the podium when I speak.
You can get the Time Timer online from TimeTimer.com or through my online store. Wristwatch and computer desktop versions are also available, but I prefer the new 3.5-inch Mod and 7-inch Time Timer Plus models.