Every other wearable counts your steps and guesses at your night. Lull does one thing: it reads your sleep with clinical-grade sensors, then tells you exactly what to change tomorrow.
Last night
7h 42m asleep
Sleep score
91
Lull samples continuously from your finger — where the arteries sit close to the surface and the signal is cleanest — instead of guessing from your wrist.
A sleep tracker you notice is a sleep tracker that changes what it is measuring. Lull is machined from a single piece of titanium, rounded on the inside, with no screen, no buzzing and no notifications.
The sensors sit against the palmar arteries of your finger, where the blood-volume signal is roughly an order of magnitude stronger than at the wrist. That is the entire reason the ring form factor wins for sleep — and the reason we did not build a watch.
No screen. No haptics. Nothing to check at 3am.
Why we are building it
Most wearables bury the answer in dashboards. If your ring cannot tell you what to change tonight, it is a toy.
Full export, any time, in a format you can actually open. No subscription holding your own sleep hostage.
We are not adding step counts, calorie rings or workout modes. Focus is the product.
Lull is still being built, and we would rather say nothing about price than say something we have to walk back. When pre-orders open, they will open here first.
You will not pay a monthly fee to read your own sleep. Every feature the ring can do, it does — for as long as you own it.
Full export, any time, in a format you can actually open. Delete it all permanently whenever you like.
No locked metrics, no premium tier, no "upgrade to see your REM." That is not a business we want to be in.
Questions in the meantime? hello@lullring.com
If something is not here, email us.
We are building the ring we wanted to exist. Pre-orders open soon — until then, come and read what it actually measures.