تحميل وتنزيل Recommended Sleep Calculator APK برابط مباشر سريع للاندرويد
App calculates the number of hours you should sleep based on your age.
The results are based on a research study conducted by The National Sleep Foundation that took more than two years of research to complete. Following is the link to the research paper:
http://www.sleephealthjournal.org/article/S2352-7218%2815%2900015-7/fulltext
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