Toggl Track is a freemium software (paid version + free version) with desktop and mobile apps. It is possible to register and control hours easily and quickly with it.
I’ve been using the free version for a few years now. Soon, I will provide a complete tutorial of this fantastic app.
This video presents a quick demo of how the software works.
Learn more in my post Time management system: time tracking, time blocking, activity tagging, and analysis.
Notes
Acknowledgments: I’d like to thank my English teacher Dr. Vince L.