Peaks: Sleep & Energy

That afternoon crash isn't random: it's your rhythm. Peaks analyzes your sleep to predict when you'll focus, fade, and recover, so you stop fighting your body and start working with it. No manual logging required; if you already track sleep, you're ready. It uses the two-process model of sleep regulation—the circadian rhythm and sleep pressure—so your personalized energy curve updates every morning based on your actual sleep.

What Peaks tracks and why it helps: Energy Peaks and Energy Dips show when focus is highest and when to schedule breaks; Sleep Timing reveals melatonin cues; Sleep Debt tracks missed hours; Recovery Score uses HRV and heart rate to gauge readiness. Built for your workflow with Home Screen/Lock Screen widgets, an Apple Watch complication, calendar overlays, Shortcuts, and smart notifications. It connects to Apple Watch, HealthKit, Oura Ring, and Garmin, all on-device with no accounts or servers, keeping your data private. Join 100,000+ people planning around biology.