One habit. Fourteen nights. A real answer.
Generic tips like "cut caffeine, cool the room" are on every blog. Somnia tests them against your own deep sleep, one change at a time.
Your baseline, on day one
Somnia reads the last 30 nights of sleep stages already in Apple Health. No new hardware, no phone under your pillow.
Five-second check-ins
Each morning, tap what you did last evening: alcohol, a late meal, caffeine after 2pm, an evening workout, a warm room.
Run an experiment
Change one habit for 14 nights. Somnia compares your deep sleep against your baseline and tells you how confident the result is.
Not a score. A finding.
Every result shows the number of nights behind it and a confidence label: Strong signal, Likely or Too early to tell. Somnia sets a deliberately high bar so it doesn't hand you coincidences dressed up as insights.
By night three you get a first read on how your logged nights compare with your baseline. That first read is labelled early, not conclusive.
Trackers tell you what happened. Somnia tells you what works.
| Typical sleep tracker | Somnia | |
|---|---|---|
| Sleep data | Phone microphone or its own device | The wearable you already own, via Apple Health |
| Advice | General tips for everyone | Tested on your own nights, one habit at a time |
| Proof | A nightly score | Before-and-after deep-sleep minutes with a confidence label |
| Two wearables? | Usually one device at a time | Overlapping Watch and Oura data counted once |
| Your data | Varies by app | Check-ins and experiments stay on your iPhone |
Everything around the experiment, in one place.
Experiments are the core. The rest of Somnia Deep Sleep helps you keep the routine that makes them work.
Last night, by stage
Deep, core, REM and awake time from your wearable, your bedtime window and a seven-day trend on one screen.
Sleep diary and ISI check
Log lights-out and rise time, take the standard Insomnia Severity Index, and follow a weekly CBT-I-style checklist.
Guided breathing
A wind-down breathing exercise with haptic pulses on each inhale, hold and exhale, so you can do it with your eyes closed.
Start with a 7-day free trial.
Check-ins, your baseline and your first insight are free. Experiments and the full "what affects your deep sleep" report need Premium.
Monthly
- Unlimited experiments
- Full habit-effect report
- Cancel anytime in the App Store
Yearly
- Everything in Monthly
- Enough time for a dozen-plus experiments
Founding lifetime
- Everything, forever
- Direct line to shape the roadmap
Prices in USD. Subscriptions are billed through your Apple ID and renew automatically unless cancelled at least 24 hours before the period ends.
Honest answers
Can a wearable really measure deep sleep?
Not perfectly. Wrist and ring sensors estimate sleep stages, and none matches a sleep lab. But they're consistent from night to night for the same person, and that's what an experiment needs. Somnia compares you with yourself, not with a lab or with other people.
Which devices work?
Anything that writes sleep stages to Apple Health: Apple Watch, Oura and Whoop are the main ones. If you wear two, Somnia counts overlapping deep sleep once instead of adding it twice.
How sure are the results?
Each result shows how many nights it's based on and a confidence label. Somnia uses a stricter threshold when it scans all your habits at once, because testing many habits at the same time makes chance findings more likely. Habits that usually happen together, like alcohol and a late dinner, are flagged so you can separate them with an experiment.
Where does my data go?
Your Apple Health data is read on your iPhone and your check-ins and experiments are stored on it too. We don't sell health data or use it for advertising. See the privacy policy.
Is this medical advice?
No. Somnia is a wellness tool for experimenting with everyday habits. If you think you have a sleep disorder such as insomnia or sleep apnea, talk to a doctor.
When is it available?
Somnia is in private beta on iPhone. Join below and we'll email you when your spot opens. Founding-price reservations are honoured at launch.
Be first to find out what works for you.
No payment today. Pick what you'd like and we'll email you.