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- • We're committed to accuracy, privacy, and evidence-based guidance. Every calculation uses peer-reviewed sleep science formulas. We never store personal data—your sleep information stays on your device. We maintain editorial standards by citing sleep research (Dement, Rechtschaffen, Walker, Czeisler) and collaborating with sleep clinicians. We're transparent about our limitations: our calculator provides general guidance, not clinical diagnosis. For sleep disorders (apnea, insomnia, narcolepsy), consult a board-certified sleep specialist.