Start a timer in seconds, try the Pomodoro technique or just looking for a (world)clock in your menu bar?

Check out these Mac Menu Bar Time Apps:

Twenttty

twenttty

Twenttty notifies you about taking a 20 second break every 20 minutes of your screen activity. A nice way to prevent eye strain. The app doesn’t interrupt your workflow (you’re free to have a break or ignore it) and it respects “Do Not Disturb”.

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Twenny

twenny

Twenny reminds you to give your eyes a break every twenty minutes. It’s based on the 20-20-20 rule: Look at something that’s 20 metres away for 20 seconds every 20 minutes to prevent digital eye strain.

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Moment

moment

Moment is a menu bar based countdown app to help you remember the most memorable days of your life. Every single event can be added to the menu bar as an individual menu item.

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TinyStopwatch

tinystopwatch

With TinyStopwatch you can easily keep track of the time you spent on work or other activities. During use, the time and current status (running, paused, stopped) are displayed in your menu bar.

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