The restless sleeper
See exactly when the night fell apart, and which habits move the needle.
Ships in 2 weeks
· LP-1
Know how you slept before you open your eyes.
Loop is a screenless band that reads your sleep, recovery and heart through the night, then hands you one clear readiness score the moment you wake.
Free shipping
30-day returns
2-year warranty
Tracking · night 4
CES Innovation
Award · 2026
Award · 2026
4.7 · 612,408 owners
The Atlantic Health
WIRED
Restorative
SleepLab Review
Outside
The Quantified
Recovery Weekly
GearNorth
What Loop reads
Five signals, one band, all night.
No screen to glance at, no buzzing on your wrist. Loop measures while you sleep and saves the talking for the morning.
Night view
23:10 → 06:34
Deep
1h 12m
REM
1h 38m
Light
4h 09m
Awake
25m
01 — Your night, mapped
Every stage of the night, drawn out clearly.
Loop tracks sleep stages, heart-rate variability, resting heart rate, skin temperature and blood-oxygen from a sensor array that sits flat against the inside of your wrist. In the morning you get the whole night as one honest picture — not a vague rating.
Measured each night
Sleep stages
HRV
Resting HR
Skin temp
Blood-oxygen
02 — A score by the time you wake
One readiness number, not a spreadsheet.
Loop folds your HRV, skin temperature and blood-oxygen into a single daily readiness score from 0 to 100. It tells you, in one glance, whether to push hard today or take it easy — and it explains the why in plain language underneath.
The score is personal. Loop learns your baseline over the first two weeks, so an 82 means 82 for you.
Today · readiness
HRV
61 ms
Skin temp
-0.1°
SpO₂
97%
Inside the band
5 components
03 — Seven days, no screen
Charge it on a Sunday. Forget about it.
With no display to power, Loop runs a full week on a charge — so it's on your wrist for the nights that actually matter. Five sensors sit inside an 8-gram band you stop noticing by day two. The app is the screen; the band just listens.
Battery life
7 days · 45-min charge
Day 1Day 3Day 5Day 7
The Loop app
The screen lives in your pocket, not on your wrist.
Everything Loop measures shows up in a calm, fast app for iOS and Android. Open it once over coffee — that's the whole interaction.
Morning readiness
Your score and a one-line read on the day, ready before your feet hit the floor.
Sleep breakdown
A full hypnogram of deep, REM and light sleep, with the times you stirred.
Trends over time
Watch HRV, resting heart rate and sleep debt move across weeks and seasons.
Gentle nudges
A quiet wind-down reminder tuned to your readiness — never an alert that shames you.
Export & share with a clinician
Generate a clean PDF of any date range to bring to a doctor or sleep specialist — your data, on your terms.
Hardware
The full spec sheet.
Loop LP-1, running firmware v2.4. Every figure measured, none rounded for marketing.
Sensors
- Heart rate
- PPG optical, green + IR
- Motion
- 3-axis accelerometer
- Temperature
- Skin-temp thermistor
- Blood-oxygen
- SpO₂ red/IR sensor
- Sample rate
- 25 Hz nightly
Power
- Battery life
- 7 days typical
- Charge time
- 45 min, 0–100%
- Cell
- 22 mAh Li-poly
- Charger
- Magnetic pogo dock
- Standby
- 40 days, idle
Build & fit
- Weight
- 8 g
- Band sizes
- S / M / L
- Water resist.
- 100 m / 10 ATM
- Shell
- Titanium + medical TPU
- Profile
- 4.2 mm thick
Connectivity & system
- Model number
- LP-1
- Firmware
- v2.4.1
- Wireless
- Bluetooth LE 5.3
- App support
- iOS 16+ / Android 11+
In the box
Everything you need, nothing you don't.
Three items. Find your size, charge it once, and you're tracking your first night.
01
Loop band
The 8 g screenless band, ready in medium.
02
Magnetic charger
USB-C pogo dock — full charge in 45 minutes.
03
Sizing kit
Try S, M and L before your band ships — swap free.
Box also includes a quick-start card and the 2-year warranty leaflet.
Worn for
It earns its keep on ordinary nights.
Loop isn't a gadget for athletes only — it's for anyone curious about why some mornings feel different.
The hard trainer
Read recovery before a session and know when a rest day will pay off.
The shift worker
Track sleep that lands at odd hours — Loop scores the day, not the calendar.
The new parent
Fragmented sleep, honestly measured — proof of the nights that weren't yours.
612,408
Loops on wrists worldwide
287
Avg nights tracked per owner
7 days
Battery on a single charge
4.7
App Store & Play rating
Pricing
One price. No surprise paywall.
Buy the band once. The core app — readiness, sleep stages, every daily metric — is free, forever, with no account games.
Ships in 2 weeks
Loop band
The hardware, the sizing kit, the charger, and the full core app.
$229
one-time · no subscription required
Buy Loop · $229
or $19.08/mo for 12 months — 0% APR financing
- Daily readiness score, free forever
- Full sleep-stage breakdown & all metrics
- Free shipping & a 30-day return window
- 2-year limited hardware warranty
Loop+ membership
optionalAn add-on for people who want the long view. Skip it and Loop still works completely.
$6
/ month · cancel anytime
Add Loop+ later
decide after you've worn it — not at checkout
- Unlimited long-horizon trend history
- A written daily coaching summary
In plain terms: the band and the core app — your readiness score, sleep stages and every daily metric — work fully and forever without Loop+. The membership only adds the long-term trend archive and the written coaching summary. No nagging, no locked screens, no dark patterns.
Financing through Affirm, subject to eligibility · Loop+ billed separately · prices in USD
Owner reviews
Loved by long sleepers and light ones.
4.7
from 41,902 verified owners
578%
415%
34%
22%
11%
"I stopped checking my wrist all day and started understanding my mornings. The readiness score is the first health number I've actually changed my behaviour around."
PR
Priya Raghunathan
Bengaluru · product designer · owned 9 months
"Seven days of battery is the whole thing for me. My old watch was always dead on the one night I forgot to charge it. Loop just stays on."
MO
Mathias Ø. Lund
Aarhus · marathon runner · owned 1 year
"As a night-shift nurse my sleep is a mess, but Loop scores the day I actually slept. Finally a tracker that doesn't assume everyone sleeps at 11pm."
CN
Chiamaka Nwosu
Manchester · ICU nurse · owned 7 months
"I wear it in the pool every morning and it's never missed a beat. Eight grams — I genuinely forget it's there until the app says good morning."
TA
Tomás Alarcón
Valparaíso · swim coach · owned 5 months
Before you buy
The honest answers.
Five questions we get most. No marketing dodge.
Is there a subscription, and what do I lose without it?
No subscription is required, and nothing core is locked behind one. Your $229 buys the band and the full core app — the daily readiness score, the complete sleep-stage breakdown, HRV, resting heart rate, skin temperature and blood-oxygen — and that works forever. Loop+ is a purely optional $6/month add-on that layers on the long-term trend archive and a written daily coaching summary. If you never subscribe, you lose exactly those two things and nothing else.
How accurate is the sleep-stage tracking?
Loop's four-stage staging (deep, REM, light, awake) was validated against clinical polysomnography in a 318-night study and reached 87% epoch-by-epoch agreement — strong for a wrist wearable, though no consumer device matches a sleep lab exactly. It uses the PPG optical array, the accelerometer and skin temperature together, which is far more reliable than motion alone. For diagnosing a sleep disorder, a clinical study is still the right tool, and the app can export a clean report to bring to one.
How is my health data stored — is it ever sold?
Your data is yours. It is encrypted in transit and at rest, and it is never sold, never rented, and never shared with advertisers or data brokers — that is a written commitment, not a setting you have to find. You can export everything as a PDF or CSV at any time, and deleting your account permanently erases your records from our servers within 30 days. We make money from selling the band, not from your sleep.
Can I wear it in the shower or swimming?
Yes to both. Loop is water-resistant to 100 metres (10 ATM), so showers, pools and open-water swims are all fine — there is nothing to take off. The titanium-and-TPU shell has no charging ports exposed to water; it charges by magnetic contact on the dock. We'd only steer you clear of scuba diving at depth and high-pressure jets, which fall outside the 10 ATM rating.
Does it have a screen or notifications?
No — and that is the point. Loop has no display and pushes no texts, calls or app alerts to your wrist. The band only senses; the app on your phone is the screen. The single nudge it can send is an optional, gentle wind-down reminder tuned to your readiness, and you can switch even that off. It is built so you check in once a day, not all day.
Ships in 2 weeks
Wake up tomorrow already knowing.
A screenless band that reads your night and hands you one clear number — the moment you open your eyes.
From $19.08/mo at 0% APR · 2-year warranty · model LP-1