The Sleep Score tracks optimality based on percentages, which has the non-sensical result that a 4-hour sleep stint that logs 60 minutes REM/Deep Sleep (25%) gets higher score than 8 hour sleep with 90 REM/DS (18.75%) each.
Moderator edit: Clarified subject
Medical guidelines posit 8 hrs. The 25% is not on *any* amount of sleep, but on the 8 hrs. Ie you need 2 hours for both REM and Deep Sleep. The score should measure the difference of your hours from the benchmark 2 hours recommended for both. Current metric gives egregiously wrong conclusion that 4 hrs sleep can be "better" than 8hrs!
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