For something as simple as setting a timer, the built-in apps on our computers can be awfully fiddly. Usually you have to open a Clock app first, then navigate to a separate tab for timers. After that ...
Timers are a staple of productivity systems, which is why there are so many of them on the App Store. My favorite timer apps are the ones that are the most flexible. A little structure goes a long way ...
Chrome: Timer Tab is a free extension for Google Chrome that combines the functions of a countdown timer, alarm clock, and stopwatch, and has the ability to notify the user when an alarm goes off.