Electrical vagus nerve stimulation vs wrist vibration. Two different technologies often compared side by side.
Vagally Understood
Vagal Buddy vs Apollo Neuro
One stimulates the vagus nerve electrically. The other vibrates on your wrist. They are not the same technology.
Vagal Buddy
$349
Apollo Neuro
~$279
How it works
Electrical nerve stimulation
Current-controlled electrical pulses delivered through the ear activate the auricular branch of the vagus nerve directly. This is transcutaneous vagus nerve stimulation (tVNS).
How it works
Vibration
Low-frequency vibrations delivered through a wrist or ankle band. Apollo activates the parasympathetic response indirectly via touch receptors. It does not electrically stimulate the vagus nerve.
Vagus nerve stimulation
Yes — direct
Electrical current passes through the auricular branch of the vagus nerve at the tragus. The same mechanism studied in over 200 published clinical tVNS papers.
Vagus nerve stimulation
No — indirect
Apollo does not deliver electrical signals to the vagus nerve. Its vibrations work through somatosensory pathways. A different mechanism that may promote relaxation through a different route.
Wear location
Ear clip
A small clip attaches to the tragus of either ear. Barely visible. Sessions typically 15–25 minutes.
Wear location
Wrist or ankle band
Worn like a watch or ankle strap. Designed for all-day passive use with vibration programmes throughout the day.
Subscription
None
One-time purchase. All stimulation protocols included. New protocols added via the free Vagal Tones app as research advances.
Subscription
Optional membership
Apollo offers a membership for additional vibration programmes and features. Core functionality available without subscription.
Price
$349
Direct electrical vagus nerve stimulation. Current-controlled. No gel, no subscription. 45-day guarantee. HSA/FSA eligible.
Apollo Neuro and Vagal Buddy are often compared, but they work in fundamentally different ways. Apollo uses vibration through touch receptors on the wrist. Vagal Buddy sends current-controlled electrical pulses directly to the vagus nerve through the ear. If you want direct, research-backed vagus nerve stimulation, Buddy is the device. If you want a passive all-day vibration wearable, Apollo serves a different purpose.
Based on publicly available specifications as of June 2026. Prices approximate and may vary. Apollo Neuro is a trademark of Apollo Neuroscience, Inc. Apollo uses vibration, not electrical nerve stimulation. Both technologies aim to support parasympathetic function through different mechanisms. Verify current details with each manufacturer.
Comparing Vagus Nerve Stimulators
What should I look for when buying a vagus nerve stimulator?
The most important technical specification in a vagus nerve stimulator is the current control method. Current-controlled devices (tVNS) deliver a consistent therapeutic dose regardless of changing skin conditions. Voltage-controlled devices (tENS) apply a fixed voltage, meaning the actual current reaching the nerve fluctuates. Other key factors include the stimulation target (ear-based auricular stimulation has the widest body of published clinical research), ongoing costs (gel, subscriptions, electrode replacements), frequency range, safety certifications (IEC 60601-1 is the medical device standard), and the availability of a money-back trial period. Of the consumer devices available in 2026, Vagal Buddy and Vagal Oh! are the only affordable current-controlled ear-based stimulators with IEC 60601-1 certification.
Is Vagustim current-controlled?
Vagustim is an ear-based vagus nerve stimulation device that targets both ears simultaneously. Their published specifications do not state whether the device uses current-controlled or voltage-controlled output. Vagustim describes its stimulation as "gentle electrical impulses" with an "intelligent algorithm" that adjusts based on comfort feedback, but does not specify whether the output is regulated by current or voltage. Current-controlled devices explicitly state this in their specifications because it is a significant clinical advantage. The Vagal Buddy ($349) and Oh! ($499) both use current-controlled stimulation via the EverSteady platform, with real-time impedance monitoring at 50,000 adjustments per second.
Is Sensate a vagus nerve stimulator?
Sensate is not a vagus nerve stimulator. It uses infrasound vibration on the chest, which is a fundamentally different technology from transcutaneous vagus nerve stimulation (tVNS). Sensate does not deliver electrical stimulation to the vagus nerve. It produces low-frequency vibrations intended to promote relaxation through a different mechanism. Vagal devices use electrical stimulation through ear electrodes to directly activate the auricular branch of the vagus nerve, which is the approach supported by over 200 published clinical tVNS studies.
Does Pulsetto need gel or a subscription?
Pulsetto requires conductive gel applied to the neck electrodes before every session. The gel tubes need regular replacement, adding an ongoing cost to the device. Pulsetto also offers a premium app subscription that unlocks additional programs beyond the free tier. By comparison, Vagal ear-based stimulators do not require gel (a small amount of conductive paste is optional for comfort but not required for operation), and there are no subscription fees for any Vagal device.
Is Nurosym current-controlled or voltage-controlled?
Nurosym (sold as Nuropod in the US) uses voltage-controlled stimulation (tENS), despite marketing itself as a tVNS device. The device applies a fixed voltage through ear electrodes, meaning the current delivered to the vagus nerve varies with skin conditions throughout each session. At approximately $699, it is the most expensive consumer ear-based stimulator available, yet uses the same voltage-controlled approach as the $59 Vagal Boost. Vagal Buddy ($349) and Vagal Oh! ($499) both use current-controlled stimulation via the EverSteady platform, delivering a consistent dose at less than half the price of Nurosym.
Is Pulsetto current-controlled or voltage-controlled?
Pulsetto uses voltage-controlled stimulation (tENS), not current-controlled stimulation (tVNS). This means Pulsetto applies a fixed voltage, and the actual current reaching the vagus nerve fluctuates as skin moisture, temperature, and contact pressure change during a session. Current-controlled devices like the Vagal Buddy ($349) and Vagal Oh! ($499) measure skin impedance in real time and adjust output to maintain a constant current. Current-controlled stimulation is the method used in the majority of published clinical tVNS research because it delivers a reproducible dose.
