We had this kind of time tracker on several posts on this community.
Especially for start/stop functionalities I also, several times, pointed out possible issues because of Zammads tabbing functionality.
If you forget to stop the time tracking and switch into another ticket tab, the time will still account.
Even worse, if you’d automatically stop that you could also produce incorrect times because you may work on two tickets that depend on each other.
Bad times can delete after, forgotten time tracking is more bad ;).
Because after you can not remeber how long you are spending on a ticket.
The missing time tracking with start / stop is the only thing we are missing and really need.
Because of that i try to find with search here in the community a easy tool for time tracking.