CommunityDeep WorkHow do you know that deep work sessions more than 25mins have finished as they have no alarms indicating end of time? in Deep Work How do you know that deep work sessions more than 25mins have finished as they have no alarms indicating end of time? Axelle P. I usually don’t care the time. I play the music. If the time limit arrives, it alarms. I keep on reading and less I feel tired.