Beurer ST100 Stress ReleaZer
A diaphragm-worn device that paces breathing with low-frequency vibration and optional warmth — relaxation via breathing physiology, not electrical vagus-nerve stimulation
NOT CLEARED
No FDA clearance, registration, or CE marking found.
Key facts at a glance.
- Founded
- 1919
- Headquarters
- Ulm, Germany
- Price range
- $88–$100
The real price over three years.
Total cost of ownership · 3yr
| Hardwareone-time | $88 |
| 3-year total | $88 |
What the device does.
- + Rests on the diaphragm and cues inhale/exhale timing through rhythmic vibration
- + Three selectable breathing-cycle lengths (10, 12, 14 seconds)
- + Optional heat function
- + Free Beurer CalmDown companion app (soundscapes, reminders, session tracking)
- + About 11 hours run time (3 hours with heat on); ~4 hour charge
The trade-offs.
- + Simple, drug-free way to practise slow, paced breathing — the mechanism with the best evidence for acute relaxation
- + Tactile vibration cue makes it easy to follow a breathing rhythm with eyes closed
- + Optional heat and a free companion app with soundscapes and reminders
- + Made by Beurer, an established German consumer-health manufacturer (founded 1919)
- − Despite sitting in this category, it is NOT a vagus-nerve stimulator — no electrical current is involved
- − Limited and inconsistent US availability; mostly sold through UK/EU retailers
- − Heat function drops run time from about 11 hours to 3 hours
- − The most valuable features live in the app, not the device itself
People who want a guided-breathing relaxation aid, not an electrical nerve-stimulation device
The long read.
§ Hands-on instrument testing pending. Based on published specifications and third-party data.
Overview
The Beurer ST100 Stress ReleaZer is a palm-sized device you rest on your diaphragm; it transmits a gentle rhythmic vibration that cues when to breathe in and out, optionally adds warmth, and pairs with Beurer’s free CalmDown app. It lives in our vagus-nerve / relaxation category — but the first job of this review is to be precise about what it is and isn’t.
It paces breathing — it does not stimulate the vagus nerve
This is the single most important thing to understand before buying. True transcutaneous vagus-nerve stimulation (tVNS) devices — gammaCore, Nurosym — deliver a calibrated electrical current to a branch of the vagus nerve. The ST100 delivers no electrical current at all. It works the same way a coach saying “breathe in for four, out for six” works: by slowing and regularising your breathing, which engages the parasympathetic nervous system through normal respiratory physiology.
That puts it alongside the non-electrical devices in this category — like Apollo Neuro (vibration) and Sensate (infrasonic resonance) — rather than the electrical stimulators. If you specifically want vagus-nerve stimulation, this is not that device. If you want a tactile metronome for slow breathing, that’s exactly what it is.
What it does
- Three breathing-cycle lengths (10, 12 or 14 seconds) let you slow your breathing progressively.
- An optional heat function adds warmth against the abdomen.
- The CalmDown app layers in ambient soundscapes, session reminders and basic tracking.
- Battery runs about 11 hours, dropping to ~3 hours with heat, and recharges in roughly 4 hours.
Slow, paced breathing at around 6 breaths per minute is one of the better-supported, lowest-risk ways to acutely shift toward a calmer physiological state. The ST100 is a tool to help you do that consistently — not a treatment.
What we won’t claim
We won’t repeat marketing language about “relaxing nerve pathways” or lowering blood pressure as established outcomes — those are not demonstrated for this device. This is a wellness product that supports a relaxation practice; it does not treat anxiety, hypertension or any medical condition. If you have a health concern, that’s a conversation for a clinician, not a gadget.
Availability and price
Around $88–$100 where stocked. US availability is patchy — the product is sold mainly through UK and EU retailers, and the common Amazon listing is the UK one. Factor that into shipping and support expectations if you’re in the US.
Verdict: Not yet tested
We haven’t bench-tested the ST100, so we’re not assigning a recommendation. Conceptually it’s a sound, low-risk way to build a paced-breathing habit, and Beurer is a credible maker. Just buy it for what it is — a breathing trainer with a vibration cue — and not as a vagus-nerve stimulator.
How we’ll assess it
If we test it, we’ll evaluate how well the vibration cue entrains breathing, whether the app meaningfully adds to the experience, and real-world battery life with and without heat. See our methodology.
Changelog
- 2026-06-16: Initial listing. Not yet tested. Clarified that the device is a paced-breathing aid, not electrical vagus-nerve stimulation.
What we'll measure on the bench.
- Protocol
- Polar H10 + Kubios HRV (pre/post stim)
- Primary metric
- RMSSD delta after 30-min stimulation
- Pass threshold
- ≥+10% RMSSD increase post-stim
- Session shape
- 7 paired pre/post sessions
§ Bench session pending. Measured values will replace this panel as the protocol completes — see Plate VI · Methodology for the full testing rulebook.
Common questions.
- How much does Beurer ST100 Stress ReleaZer cost?
- Beurer ST100 Stress ReleaZer costs $88–$100.
- Does Beurer ST100 Stress ReleaZer require a subscription?
- No. Beurer ST100 Stress ReleaZer does not require a subscription — there is no mandatory recurring fee to keep using it.
- Is Beurer ST100 Stress ReleaZer FDA cleared?
- No. Beurer ST100 Stress ReleaZer is not FDA cleared.