Daily timer is an option to log active timer daily on each working day.
If enabled then every day timer will log full working day (1d) until timer is stopped, paused or daily option is disabled for the timer.
The work log will be added daily on started time of a timer.
Daily timer can be enabled/disabled for a timer in issue view or on timers' list.
Issue View
Timers' List
Enable daily timers in project settings
Enable daily timers in Automated Log Work project configuration to allow use daily timers