Your Eight Sleep nights + HRV, in full detail — synced to Apple Health.
Detailed analysis of every Eight Sleep night, plus one-tap export of HRV, sleep stages, heart rate and more to Apple Health.
7 nights free·No Nocturne account·No servers
One night, as Nocturne shows it — and as it lands in Apple Health.
Your mattress measures HRV every single night. Apple Health never hears about it.
Eight Sleep's own sync leaves out the one metric every recovery app is built on. Nocturne closes that gap — and then gives you the rest of the night in detail no sleep app bothers to show you.
Six things, done properly.
Export to Apple Health
Your smart mattress doesn't natively export HRV to Apple Health. Nocturne fills that gap — send the full 5-minute HRV time series, the same granular format an Apple Watch writes, or a single nightly average. Your choice, changeable any time.
Nightly Analysis
HRV charted across the night, a sleep-stage hypnogram, heart rate, respiratory rate, room and bed temperature curves, and full summary stats.
Trends Over Time
Average HRV, resting heart rate and sleep duration across 7, 30 or 90 days — so you can see where your baseline is actually heading.
Automatic Morning Sync
Nights land in Apple Health before you open your recovery app. Works with Bevel, Athlytic, and anything else reading Health.
Bulk Backfill
Just installed? Pick a date range and push months of past nights into Apple Health in a single tap.
Private by Design
No accounts, no analytics, no servers. Data goes from Eight Sleep to Apple Health on your device — nowhere else.
Anything that reads Apple Health.
Try it on a week of your own nights.
Free
Sync 7 nights, with no time limit.
- Full nightly detail for those nights
- Export to Apple Health
- No account, no card
Nocturne Pro
Unlimited syncs, automatic morning sync, the full HRV time series, bulk backfill and detailed analysis.
Eight Sleep, Apple Health, and HRV.
Questions people actually ask.
When does my night sync to Apple Health?
Automatically — once Eight Sleep finalizes your sleep session, which can take up to an hour after you get out of bed. With automatic morning sync on, Nocturne exports the night on its next background check, with no need to open the app. You can also open Nocturne any time to sync a night the moment it appears.
Does Nocturne export HRV to Apple Health?
Yes — that's the main reason it exists. Eight Sleep measures HRV every night but never writes it to Apple Health. Nocturne exports it, either as the full 5-minute time series (the format Apple Watch uses) or a single nightly average.
Do I need an Apple Watch?
No. All the data comes from your Eight Sleep mattress — HRV, heart rate, respiratory rate, and sleep stages — so you get recovery metrics in Apple Health without wearing anything to bed.
Does it work with Bevel, Athlytic, and other recovery apps?
Yes. Those apps read from Apple Health. Once Nocturne puts your Eight Sleep HRV and sleep data there, they use it to compute your recovery and readiness scores automatically.
Is my data private?
Yes. Nocturne runs no servers. Your Eight Sleep credentials go straight to Eight Sleep, your session token stays in your device's encrypted Keychain, and your sleep data is processed on-device before being written to Apple Health. Nothing is collected or tracked.
What does Nocturne cost?
Sync 7 nights free, with no time limit. Nocturne Pro then unlocks unlimited syncs, automatic morning sync, the full HRV time series, bulk backfill, and detailed analysis — $3.99/month, $24.99/year, or $49.99 once for lifetime.
Is Nocturne made by Eight Sleep?
No. Nocturne is an independent app that accesses your own Eight Sleep data on your behalf. It is not affiliated with, endorsed by, or sponsored by Eight Sleep.
Your data never touches our servers
TEK Strategies operates no backend for Nocturne. Your Eight Sleep credentials go directly to Eight Sleep; your session token lives only in your device's encrypted Keychain; your sleep data is processed entirely on-device. Read the full privacy policy.
Start with tonight.
7 nights free·iPhone · iOS 26 or later
Nocturne uses Eight Sleep's API to access your own sleep data on your behalf. It is not affiliated with, endorsed by, or sponsored by Eight Sleep. Eight Sleep is a trademark of Eight Sleep, Inc. Apple Health is a trademark of Apple Inc.