The world's first EEG earbuds.Up to 2x more deep sleep, meditation, and focus.
Sleep deeper. Wake recovered.
Adaptive audio reads your brain in real time and guides you into slow-wave sleep — the deep, restorative stage your body needs most. Beta users saw measurable increases in deep sleep within their first week.
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Quiet the mind in 5 minutes.
Most meditation apps give you content. Smartbuds give you feedback — reading your brain as it settles and adjusting the audio to bring you down faster. Not another sleep story. A real-time interface to your nervous system.
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Lock in. The brain knows when.
Built-in EEG detects when you're in flow and when you're slipping. Audio adapts to keep you locked in — without the jitters of caffeine or the crash that follows. Designed for the work that actually requires your full attention.
Shop Now →Clinical-grade EEG in 5 grams.
For decades, measuring brain activity meant a sleep lab. NextSense Smartbuds put six dry-contact EEG sensors into the form factor people already wear — clinical sampling rates, no gel, no setup, no compromise on signal quality.
NextSense ear-EEG captured 86.4% of focal seizures detected by traditional clinical methods — validated in a multi-site study over 1,255 hours of simultaneous recording with medical-grade EEG.
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Answers to important questions
EEG & Brain data
What is EEG and why does it matter?
EEG (electroencephalography) measures electrical activity in the brain. It's the gold standard for sleep science, allowing Smartbuds to detect sleep stages and optimize audio in real time—unlike wrist trackers that only infer sleep from movement or heart rate.
Can Smartbuds read my thoughts?
No. EEG detects patterns like sleep depth or transitions—not thoughts, memories, or emotions. Your mental privacy is deeply respected.
Is my brain data private?
Yes. We never sell or share your data. Data sharing is off by default, and all information is encrypted, stored securely, and anonymized before leaving your device. You can delete your data anytime from within the app.
What is slow-wave sleep?
Slow-wave sleep, also called deep sleep, is the most restorative stage of sleep. It's when your brain produces slow, high-amplitude delta waves. This stage is essential for waking up refreshed.
Sounds
Can sound hurt my sleep?
It can—if it's the wrong kind. Jarring, unpredictable, or overly stimulating audio can disrupt your rest. That's why Smartbuds use gentle soundscapes specifically designed to support healthy sleep. When personalized and timed right, sound can actually enhance your sleep rather than interrupt it.
What is slow-wave enhancement?
Slow-wave enhancement is a technique that uses precisely timed sound to nudge your brain waves into their most restorative rhythm. This the enhances the quality of your sleep without waking you up.
Care & Cleaning
How do I clean my earbuds and sleeves?
Use a cloth dampened with bottled water to gently clean the surface. Let everything dry completely before using again. Clean weekly for best performance.
How do I replace my wings and/or tips?
Smartbuds' wings and tips require regular replacement to continue collecting brain data. Always handle them gently and even if you're only swapping out wings, you’ll need to take the tip off first.
Step 1: Remove the tip. Hold the earbud firmly in one hand. With the other hand, pinch the silicone tip near its base and pull it straight off using a slow, steady motion. Don’t twist or yank—these components are delicate and house important sensors.
Step 2: Remove the wing. Gently peel the wing away from the body of the earbud, starting at one edge and working around. It should come off with light, even pressure—no need to force it.
Step 3: Attach the new wing. Align the new wing so that the cutout fits neatly around the base of the earbud. Stretch the wing gently into place and press it down so it sits flush and snug against the earbud.
Step 4: Attach the new tip. Align the new tip with the nozzle of the earbud. Press it on firmly until it feels secure—you may hear or feel a soft click when it’s in place.
Are Smartbuds waterproof?
No. Avoid rain, heavy sweat, and any moisture exposure. Do not submerge them in water or wear them in the shower.
Apps & Features
What is sleep routine?
Your sleep routine is the window when you aim to be asleep—from your usual bedtime to your usual wake-up time. Setting it helps us customize your experience, like reminding you to charge your Smartbuds before bed. It doesn’t set an alarm or prevent you from starting a sleep session at a different time. Many users also find it helpful for setting sleep goals and keeping a consistent sleep schedule.