Clockify

If you’re working with others, managing everybody’s time is important for success. Toggl can help you manage other people’s time, but as mentioned before, it’s not free.
Clockify brags about being the only truly free time tracking tool for teams, but you can also use it just for you. You can have as many users as you want, and control what you and other people from your team are working on. You can control this from your Mac or your iPhone with its app.
It’s simple to use, and completely free. If you want to start tracking your time without investing any amount of money, Clockify is a great place to start.