The short version

What it is: an earpiece that sends a mild current toward a branch of the vagus nerve in your outer ear, while it reads your heart rate and breathing and adjusts. Made by MindSpire, a small company in Tunbridge Wells, England.
Where it's sold: direct from sona.help, which ships from the UK to the UK, the US, Canada, Australia and the EU. It isn't FDA-cleared, and SONA says it isn't a medical device.
Price (as of October 2026): £695 including UK VAT, about $941 in the US. No subscription, 30-day returns, a 1-year warranty and a waitlist.
Best for: HRV trackers who want to watch what happens during a session.
Skip it if: you have a pacemaker or other implant, epilepsy or a heart condition, or you're pregnant, unless your doctor says yes.
The honest take: the most interesting idea among ear devices. But "personalised" is untested, SONA has no published trial, and early owners report fit problems and long delays.

Dinner, and a buzz on your wrist

It's ten past seven and you're stirring pasta when your watch buzzes: high heart rate, while you're standing still. Again. Later, in bed, an ad shows a sleek white earpiece that promises to read your body and calm it in ten minutes a day. Personalised, it says.

That word is doing a lot of work.

What it is and how it works

SONA hooks over your ear like a wireless headset. You brush conductive gel onto its two small electrodes with an included pen, slot it on, and open the free app, which rates your contact. One electrode presses into the cymba concha, the hollow above your ear canal. The other sits at the tragus, the flap in front of it.

You set a session length, a breathing pace and an intensity from 1 to 20, and watch your heart rate, heart rate variability (HRV) and breathing live. Marketing says 10 minutes a day; SONA's team has mentioned 10 to 40. Reviewers describe a fizz or tickle; set too high, it pinches.

"Personalised," per SONA, means the app builds a program around your goal, an algorithm adjusts the waveform and timing to your HRV and breathing, and over weeks it learns what you respond to. SONA doesn't publish its frequencies or current. For ear versus neck devices, see the Zappers.

Is this a vagus nerve tool?

Mostly, yes. In the most-cited dissection study, of 14 ears, the vagus branch reached the cymba concha in every one, so SONA's main electrode is in the right place. It reached the tragus in fewer than half.

The sensing is the new part, and a reasonable idea. Nobody has yet shown that adjusting stimulation to your HRV and breathing beats a fixed setting for stress or sleep.

What the evidence actually says

On SONA itself, we found no published trial and nothing on ClinicalTrials.gov. Its research is early:

A five-person pilot, which SONA says improved an HRV stress ratio. Unpublished, as far as we could find.
A UK government-funded tinnitus feasibility study with an NHS trust and SONA's chief scientist: about a dozen people, no comparison group, and an off-the-shelf TENS unit, not SONA. This appears to be the "NHS-supported" research SONA mentions.
SONA's user data: across 1,000+ sessions, HRV rose 18% on average during a session.

That last number needs context: sessions come with a slow-breathing pacer, and slow breathing raises HRV by itself. The site's bigger promises, "HRV up to 2× baseline" and 30 to 40 extra minutes of deep sleep a night, come with no source we could find.

The studies SONA cites test other devices at other doses. They include the Czech sleep trial (68 adults), which SONA itself calls inconclusive against sham, and the 2024 insomnia trial (72 people, mostly women in their mid-40s), where the sham group improved about half as much as the real one, on about four times SONA's weekly dose.

The wider picture. Ear stimulation's strongest results are in hearts, like the NIH-funded Oklahoma trials in atrial fibrillation and POTS. For stress and sleep, it's promising but early, and expectation does a lot of work. More on reading studies in the Science.

What owners commonly report

Orders began arriving around March 2026, after long delays. As of October 2026, SONA scores 4.3 on Trustpilot from 53 reviews (79% five-star, 11% one-star), mostly from the UK, and it invites reviews. The iPhone app has 4.1 stars from 7 UK ratings.

The good

Many reviewers report better sleep or less anxiety within weeks, some with rising HRV on a ring or watch.
Design and support get praise, including a founder who steps in personally.
A Daily Mail columnist, writing with affiliate links, reported calmer days and more deep sleep, while also drinking less.

The not so good

On Reddit, fit is the top complaint: the earpiece easing out unless you use lots of gel. One owner said it sat loose on his wife's ear.
Most one-star Trustpilot reviews are about late orders and unanswered emails.
Early units had flaws, such as an exposed wire, and the app has had connection bugs.
Some notice nothing. One detailed early reviewer returned his.

Price, returns and privacy (as of October 2026)

Device: £695 including UK VAT; about $941 in the US or €836 in Germany. SONA says it covers import taxes.
Software: the app is free. An optional one-off £295 "Premium" tier adds analytics and coaching.
Gel: refills cost about £13 to £15 ($15 to $20); SONA says a large bottle lasts 6 to 12 months.
Availability: the product page offers "early October shipment, or wait until 2027." Get a ship date in writing.
Returns and warranty: 30 days from delivery, original packaging, email first; SONA sends a free label. A 1-year warranty.
HSA/FSA: SONA's Innovate UK profile says it's eligible, but we found no way to use it at checkout.
Privacy: heart rate, HRV and breathing data are stored encrypted on SONA's servers in the US or EU. SONA says it doesn't sell personal data and may use anonymised data to improve its algorithms. Apple's label shows no tracking; Google Play's lists analytics sharing of app activity. Its terms still contain placeholder text where the governing law should be. Small thing. Telling, though.

How it compares

Prices as of October 2026:

Nurosym (£599 UK; sold in the US as Nuropod for $900): a tragus clip with the most research of any ear device. No app, 30 to 60 minutes a day.
Xen by Neuvana ($359 on sale): earbuds, about 15 minutes a day, HSA/FSA possible through Truemed.
Pulsetto (Lite $242): a neckband with gel and app upsells.
Truvaga ($325 or $499): a handheld neck device, two-minute sessions, US only.
Free slow breathing: the part of a SONA session you can do without SONA.

Only SONA reads your body while it works. It's also the newest and least tested.

Who should skip it or ask a doctor first

We found no contraindications list from SONA. Its terms say to ask your doctor first if you have a pre-existing condition or an implant such as a pacemaker; its blog adds epilepsy and pregnancy.

A better guide is that NHS tinnitus study. It excluded people with a pacemaker or other implant, epilepsy, heart disease, a slow heart rhythm or past heart attack, pregnancy, asthma or COPD, Raynaud's or ear skin problems, and people taking beta blockers. I'd treat that as the minimum. Note the last one: plenty of midlife women take beta blockers for palpitations or migraine.

If a racing heart is new, especially since perimenopause, get it checked before blaming stress. A device can sit alongside treatment, HRT included, but it can't replace a diagnosis.

Try this free tonight

SONA's own breathing research landed on about five breaths a minute. Try it tonight, free: lie down and breathe in for five counts, out for seven, for ten minutes. A 2022 review of 223 studies found slow breathing raises the heart rate variability linked to your vagus nerve. More free options are in the Analogs.

FAQ

Does SONA work?

Some owners say it helps their sleep and anxiety; others notice nothing. SONA has no published trial, and its personalisation is untested.

Is SONA available in the US?

Yes. It ships from the UK, at about $941 as of October 2026. It isn't FDA-cleared, returns go back to the UK, and we found no HSA/FSA option.

Is SONA a medical device?

No. SONA calls it a "non-medical wellness device" with CE and UKCA marks, which here cover things like electrical safety, not health claims.

SONA vs Nurosym: which is better?

Nurosym has far more research and a 2-year warranty, but no app and long sessions. SONA is quicker, reads your body and costs about £100 more in the UK. For evidence, Nurosym. For data and design, SONA, with the return window as your safety net.

The bottom line

SONA is the most ambitious ear device we've looked at: real-time sensing, a thoughtful app and an unusually open team. But "personalised" is a design idea, not a proven result, and early owners have faced fit problems and long waits.

If £695 won't hurt, I'd treat it as a 30-day experiment: get a firm ship date, use it daily, keep the box, and decide by week three. Keep the slow breathing going either way. It fits every ear.

SONA