There is a Time Tracker App for everyone.

Time Tracker App

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Keep track of time spent on any task or a project
If you want to track time on any type of task, this app is for you. Select a row, start your time tracker and add it directly to that row to measure minutes, hours or days spent on that particular task. You can also add your collaborators to each row to see how long someone is spending on that task and getting things done.