Drift into deeper sleep, guided by AI.
Lull is a personal sleep coach that listens, learns, and gently guides you into rest — with adaptive bedtime stories, generative soundscapes, and breath-paced wind-downs.
A wind-down designed for you.
Tell Lull how the day went, and it shapes the night around you — no preset playlists, no rigid routines.
Talk it out
Share what's on your mind in a short conversation. Lull listens — no judgment, no logs anyone else can see.
Tonight's prescription
Lull composes a wind-down: a breath cadence, a soundscape, a story or silence — calibrated to how you arrived.
It learns you
Every night refines what works. By week two, Lull knows whether rain helps and which voice eases you under.
More than a sound library.
Built around the science of sleep onset — and the part of you that doesn't want a checklist.
Adaptive stories
Bedtime stories that slow, soften, and fade — written by humans, paced by AI to your breath.
Generative soundscapes
Rain, ocean, room tone — generated fresh each night so no loop ever pulls you back.
Breath pacing
4-7-8, box, or coherent breathing — adjusted live to your heart rate if you're wearing a wearable.
Honest sleep insights
No vanity scores. Just what helped, what didn't, and what to try tomorrow.
Gentle wake
Wakes you in the lightest phase of your cycle, with sound that rises like dawn.
Private by design
Conversations are end-to-end encrypted and never used to train anyone else's models.
A coach for the 30 minutes before sleep.
Lull's guide is grounded in sleep science, CBT-I principles, and thousands of hours of bedtime narration. It speaks softly, asks better questions than your own racing mind, and knows when to stop talking.
Meet your guide"I've tried five sleep apps. Lull is the first one that feels like it's actually paying attention." — Beta tester, week 3