Cool timer - to alert you when you've stayed too long

Hi everyone On visiting the pain clinic the other day and mentioning that my back pain and hug are worse when I’ve been on the computer and I know i should not stay on too long. She advised me that I could down load something called a Cool timer. You can set it for however many hours or minutes you want and choose what sound that you want to alert you. I have chosen a bugle. It made me jump yesterday when it came on but at least it works. Thought others might appreciate this little tool. Wendy x