Just Sleep Well
A transparent Rest Score from your Apple Watch — computed entirely on your phone
Just Sleep Well computes a free, transparent Rest Score from your Apple Watch data — the actual math shown, not a black box — plus a sleep-stage timeline, automatic pattern-finding across caffeine, meals, workouts, and alcohol, sleep debt and energy forecasting, and a one-tap morning notification. 100% on-device: no account, no ads, no third-party SDKs.
Key Features
Free, Transparent Rest Score
A 0–100 Rest Score that's free, not a paywalled teaser — tap the ring and see the actual scoring curves it's built from, drawn right in the app.
Sleep-Stage Timeline
A real hypnogram from your Apple Watch: REM, core, deep, and every wake, laid out minute by minute.
Automatic Pattern-Finding
Checks your nights against the caffeine, meals, workouts, and alcohol already sitting in Apple Health, and surfaces what actually correlates with your sleep.
Sleep Debt, Energy Forecast & Caffeine Coaching
A running debt tally, a forecast for how today might feel, and plain caffeine coaching timed to your bedtime.
Morning "What Happened" Notification
One tap from a morning notification logs caffeine, alcohol, or a rough night — no need to open the app.
Apple Watch App, Widgets & 100% On-Device
A native watch app and widgets keep your score a glance away. No account, no ads, no third-party SDKs — the App Store privacy label reads Data Not Collected.
A Score, Not a Black Box
Most sleep apps hand you a number and ask you to trust it. Just Sleep Well's Rest Score is free — not a teaser locked behind a subscription — and every factor behind it is visible in the app. Tap the ring and you'll see the actual normalization curves the score is computed from, the same math running under the hood. No hidden formula, no premium score gate, no asterisk.
It Finds the Patterns, So You Don't Have To
Every morning, Just Sleep Well quietly checks your night against the caffeine, meals, workouts, and alcohol already sitting in Apple Health, and surfaces what actually shows up in your own data — not generic sleep advice. Add a running sleep-debt tally, an energy forecast for the day ahead, and a morning notification that lets you log what happened in one tap, and you get an Apple Watch app that explains itself instead of just scoring you.
Your Sleep Data Never Leaves Your Phone
There's no account to create and no server to trust, because there isn't one. Every score, tag, and insight is computed on your iPhone from data you already have in Apple Health, and none of it is uploaded anywhere. No third-party SDKs, no analytics, no ads — the App Store privacy label reads “Data Not Collected” because that's literally what happens. Optional snore detection works the same way: audio is analyzed on your phone in real time and is never recorded or stored.