I chose this product because I already knew it would work for me. I keep it primarily in my office, but also will carry it with me to help me focus on my chores. It's better than a phone app because when I would look at my phone in the past to check how much time was left on the timer, I'd end up USING my phone and get off task. Not so with the Time Timer!
It shows the time left visually in high contrast colors, so it immediately in the brain, whether the person using it (child or adult) can read numbers or analog clocks or not, and registers in the brain without needing to process numbers. Time becomes a tangible amount you see decrease.
It's a GREAT buy if you or your family is a "visual learner" or like me, is more likely to achieve a task if you know there's a deadline. Suitable for any ages.