Both help you sleep. Only one listens to your brain.
$225 today, regularly $349. Free shipping · HSA/FSA eligible
See the
difference.
Two sleep earbuds at a similar price. What separates them is what each one measures, and what it does with the measurement.
Ozlo specifications are based on Ozlo's published product information and independent reviews of Sleepbuds 2, checked August 2026. Pricing and specifications may change.
Movement can estimate sleep. EEG measures it at the source.
Most sleep wearables infer what happened overnight from signals like movement. If you stop moving, an accelerometer can estimate when you fell asleep and how your night progressed.
EEG measures the electrical activity of your brain. Smartbuds use six dry EEG electrodes to detect brain activity from inside the ear, giving them a direct signal of what your brain is doing while you sleep.
And that measurement does more than create a morning report. Because Smartbuds can detect slow-wave activity as it happens, they can deliver precisely timed pink-noise pulses during deep sleep. Instead of simply playing sound around you, Smartbuds can respond to what your brain is doing in real time.
Measure sleep at the source. Then respond to it.
Clinical-grade sensing,
in a 5-gram bud.
The reason Smartbuds can respond to sleep rather than summarise it is the hardware sitting in the ear canal.
And they are awake with you.
Focus sessions, naps, and meditation during the day. Ozlo is built for the night alone.
Where Ozlo
has the edge.
If you're seriously comparing the two, these differences matter. So here they are.
Longer battery
Ozlo offers up to 14 hours versus up to 9 hours for Smartbuds. Nine hours covers most nights, but Ozlo is the stronger choice if maximum battery life is your priority.
Android support
Ozlo supports both iOS and Android today. Smartbuds currently require an iPhone 12 or newer running iOS 17+. If you use Android, Ozlo is the better fit right now.
More built-in sleep sounds
Ozlo offers 60+ built-in sounds and soundscapes designed around overnight noise masking. If your main goal is simply blocking a snoring partner, traffic, or other environmental noise, Ozlo does that job well.
Choose based on what you actually want from your earbuds.
Choose Smartbuds if
- You want sleep measured from brain activity, not estimated primarily from movement.
- You want audio that can respond to your brain activity in real time.
- You want one pair of earbuds for Sleep, Focus, Nap, and Meditation.
- You use an iPhone and want deeper physiological insight into what happened overnight.
Choose Ozlo if
- Your primary goal is masking noise while you sleep.
- You use Android.
- Maximum overnight battery life matters most to you.
- You want a large library of built-in sleep sounds and do not need EEG.
Don't just track sleep.
Listen to the brain doing it.
Get Smartbuds for $225 today, regularly $349. Free shipping and HSA/FSA eligibility.
About this comparison. Ozlo Sleepbuds is a product of Ozlo Sleep. NextSense is not affiliated with, endorsed by, or sponsored by Ozlo. Ozlo specifications, pricing, battery life, sensors, microphone capabilities, platform support, warranty, and return policies are based on information published by Ozlo and independent reviews of Sleepbuds 2, accessed August 2026. NextSense specifications are based on information published by NextSense. Product specifications and pricing may change. Smartbuds are a wellness product and are not intended to diagnose, treat, cure, or prevent any disease.