Super simple and easy to use interface. I do design/admin work on the side and need to keep track of my time (that's not in notepad). Tickkl integrates with slack so you can start your time there, or set automatic times. You can enter your time from start -> end time or type in hours, or just start the timer when you start and stop it when you stop.

What I'd love to see is a way to invoice clients by project or something.

All in all, does what it says! Says what it does!