Overview
The NextSense Smartbuds are wireless earbuds marketed primarily for sleep. They combine standard audio playback with an accelerometer‑based sleep tracker and, uniquely, built‑in EEG sensors to monitor brain activity overnight.
Design & Fit
The earbuds resemble the Google Pixel Buds Pro 2 in shape, though exact dimensions aren’t listed. Fit is crucial for side sleepers; oversized buds can cause bruising. NextSense mitigates this with interchangeable ear tips and conductive wings that are refreshed monthly via a subscription.
Sleep Tracking & EEG
Sleep data is captured via an accelerometer and EEG sensors, then displayed in the Smartbuds app. The EEG capability is a first for earbuds—previous EEG wearables like Muse used headbands. The app provides insights such as sleep stages, movement, and brainwave patterns.
Audio Features
Beyond tracking, the earbuds function as regular Bluetooth audio devices. Users can stream music or podcasts and optionally enable NextSense’s pink‑noise generator for sleep assistance.
Battery Life
Each earbud offers up to nine hours of use on a single charge. The charging case provides four full recharges, extending total playback time to roughly 36 hours before the case itself needs charging.
Pricing & Subscription Model
Standard retail price: $300 (currently discounted to $249). A mandatory monthly subscription costs $15 and includes:
- Replacement ear tips
- Special conductive wings for stable EEG contact
- Ensured hygiene with fresh components each night
The subscription is positioned alongside other health‑focused plans like Fitbit Premium ($10/mo) and Oura Ring 4’s $6/mo service.
Pros & Cons
- First earbuds with built‑in EEG for sleep monitoring
- Decent nine‑hour battery life per charge
- Monthly ear‑tip refresh promotes hygiene and consistent fit
- Integrated pink‑noise feature
- Higher upfront cost compared to typical sleep earbuds
- Mandatory $15/month subscription may deter budget‑conscious users
- Lack of detailed dimensions makes size comparison difficult
- Subscription duration and renewal terms are unclear
Conclusion
NextSense Smartbuds push the envelope by embedding EEG technology into a sleep‑focused earbud. For users who value detailed sleep analytics and don’t mind a recurring $15 fee for fresh tips, they offer a compelling, all‑in‑one solution. However, the ongoing subscription cost and premium price point may limit appeal to a niche audience willing to invest in advanced sleep health monitoring.