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GrindClock is a productivity timer designed around cutting-edge behavioral science research. When you activate GrindClock, it counts down from 52 minutes, which has been determined by scientists to be the optimal length of a work session. After the 52 minutes is up, an alarm will sound and a 17-minute rest timer will begin counting down. Once the second timer ends, another alarm will sound, and the 52-minute timer will begin again. This 52/17 time split has been clinically shown to increase productivity by allowing the mind time to relax and recover between work sessions.