First, many (e.g., [ 19], [20] ) rely on user data entry and so are only effective while the user remains vigilant in their record keeping.
Second, apps (e.g., [2 1] , [22] ) often require the user to modify their sleep behavior, for example, keeping their smartphone on their bed close to their body during sleep - furthermore, these applications are similarly sensitive to users complying with usage instructions.
First, many (e.g., [ 19], [20] ) rely on user data entry and so are only effective while the user remains vigilant in their record keeping. Second, apps (e.g., [2 1] , [22] ) often require the user to modify their sleep behavior, for example, keeping their smartphone on their bed close to their body during sleep - furthermore, these applications are similarly sensitive to users complying with usage instructions.
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