If you struggle to drift off, keep replaying thoughts on a loop, or just want to finally feel that your sleep actually restores your energy, Echo for iOS users and Sleep Flow for Android users can become your new nighttime ritual — helping your body and nervous system ease into a true rest mode.
It’s more than bedtime stories or calming music. Echo or Sleep Flow listens to your heart and helps you fall asleep using real science about how you sleep.
How it works
Echo or Sleep Flow is a real-time audio stream that syncs breathing patterns, tempo, and musical structure with your heart rate. This alignment eases physiological tension and helps your body gently shift into the parasympathetic state — the one responsible for deep relaxation and falling asleep.
Echo blends multiple audio techniques — from binaural beats to functional noise and pulse-responsive sound design — all tuned to your heart rate for maximum effect.
Little by little, Echo or Sleep Flow calms your nervous system and guides you into sleep faster.
What you get with Echo or Sleep Flow
An endless stream of stories and soundscapes to quiet your mind — not fuel your thoughts.
You get a wide mix of audio experiences: from slow-paced travel narratives and science mini-lectures to meditative soundscapes and immersive fiction. It’s not just background noise — it’s a way to gently switch off your inner monologue so your mind stops looping through the day and finally lets you drift off.
The free version includes a limited selection of stories. Premium unlocks 300+ evolving scenarios that are updated regularly — meaning you always have something new to listen to, and your brain doesn’t get “used to” the same track.
Heart-synced personalization that helps your body unwind automatically.
Echo matches the audio to your heart rate. This lets your body downshift at its own natural pace, melting away tension and anxiety. The result? You fall asleep faster, and the transition into sleep feels smooth instead of like you’re trying to “force yourself to relax.”
Flexible settings so Echo or Sleep Flow plays exactly the kind of sound that soothes you.
Choose the mood, genre, pulse, and voice — and turn Echo or Sleep Flow into a truly personal sleep companion.
This matters because everyone relaxes differently: some people unwind with gentle travel stories, others with science facts, others with breathing-based meditations. Echo or Sleep Flow adapts to your style of calming down instead of making you listen to something generic.
Automatic stop for a natural, interruption-free drift into sleep.
If you fall asleep and stay still for 30 minutes, Echo or Sleep Flow pauses the audio on its own. No sudden noises, no accidental wake-ups — just continuous, restorative sleep.
Smart favorites that make Echo or Sleep Flow more personal every time you use it.
Like or dislike any track. Echo or Sleep Flow learns which stories actually help you fall asleep. Your Favorites (the heart icon in the top right corner) stores the ones that work best — so you can restart the most effective sessions in seconds.
Echo or Sleep Flow works only when you’re online. You won’t be able to play sleep tracks without an internet connection.
Echo and Sleep Flow beyond the app: sleep albums and more
Welltory also has its own albums on Spotify and Apple Music, including entire collections created specifically for sleep. These are calm, slow-moving soundscapes designed to help you unwind, release tension, and slip into a drowsy, half-dreaming state.
These tracks are perfect for:
getting ready for bed
winding down before nighttime rest
creating a cozy evening ritual
But not all of our albums are meant exclusively for sleep — and that’s intentional. Some Welltory music is crafted for other important states:
For focus — steady, consistent rhythms that help you get into a flow.
For daytime stress relief — gentle breathing-inspired patterns.
For post-exertion recovery — tracks built around restoring balance to your nervous system.
This way, you can use our music throughout the day — to shake off stress, get grounded, concentrate, or simply relax before bed. And when night comes, just turn on Echo or Sleep Flow and let the sound do the rest.
Who can use the full Echo or Sleep Flow experience
The complete Echo experience is available only to Premium users. If you’re using the free version of Welltory, you’ll still get access to Echo or Sleep Flow — but in a limited format: a smaller selection of stories and no ability to customize filters.
You can find Echo or Sleep Flow in the app’s bottom navigation bar.
How to turn Echo or Sleep Flow into a nighttime ritual
Start Echo or Sleep Flow about 15 minutes before bed.
Click on Customize (for iOS users) or Tune my flow (for Android users) to open personalization settings.
Pick the mood, genre, pulse, and voice that feel right for the moment.
Press play and let the story guide you into a state of calm.
Share your feedback
Tap the question mark next to the story title and fill out a short form to share your thoughts.
If you’re having any issues with Echo or Sleep Flow, go to Menu → Report a Problem, briefly describe what’s happening, hit Send, and our support team will be there to help.
Let yourself drift off gently, quietly, and naturally. Echo or Sleep Flow will sync with your heartbeat and help your body finally unwind.