RT Journal Article SR Electronic T1 Apps and fitness trackers that measure sleep: Are they useful? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 451 OP 456 DO 10.3949/ccjm.84a.15173 VO 84 IS 6 A1 Meghna P. Mansukhani A1 Bhanu Prakash Kolla YR 2017 UL http://www.ccjm.org/content/84/6/451.abstract AB Consumers have become increasingly interested in using fitness trackers and smartphone applications to quantify sleep. The devices claim to measure various sleep parameters, with the result that patients are now showing the data from their devices to their clinicians with concerns about their quantity or quality of sleep. In general, these devices have major shortcomings and limited utility, as they have not been thoroughly evaluated in clinical populations.