lull Lull

Welcome

This app will sometimes be wrong. When it is, it costs you nothing. You're always in control. There are no streaks, no scores, no shame.

Create an account

No streaks, no scores, no shame. You can download everything we hold, or delete all of it, whenever you like.

Accounts are created with Synapse Spark, which is also how you sign in to everything else in the portfolio.

Create an account

Confirming your email

One moment.

Continue to sign in

Now

Confirm your email

Not urgent. It just means you can get back in if you're ever locked out.

Listening quietly

No wearable connected

I might be wrong. Press Escape to wave this away.

Welcome back. Nothing to catch up on. We stayed quiet.

Your patterns

Only you can see this. Self-knowledge, not a score.

Best focus windows

How we've been doing together

Tune your ally

Sensitivity Balanced

Tone

Quiet hours

Start to End

Nudges you want to hear from

Turn any of these off — everything else keeps working the same.

Task re-entry Body doubling Micro break Breathing reset Transition warning

Your plan

Loading your plan.

Devices

Inference runs on your device — pairing here only tells us which signals to expect, never what they say.

Pair a device

Platform

Wearable

Signals this device can read Heart-rate variability Electrodermal activity Movement

Data choices

Each of these stands on its own, and each stays off until you turn it on. Turning one off never costs you anything else.

On-device coaching — lets Lull read your signals locally and check in with you. Help improve the model — de-identified features only. Raw biosignals never leave your device. Aggregate employer reporting — group-level counts only. Your employer can never see you individually.

Privacy

Raw biosignals stay on your device. We only store your nudge history and feedback, and only if you asked us to.

Lull — a Synapse Spark Foundation venture. Revenue funds neurodevelopment research.