Flow is the tDCS headset most people find first when they search for at-home brain stimulation for depression. It’s also the one that changed the most since I first wrote this review.
In December 2025 the FDA approved it. In September 2026 it launched in the US. Prices, the treatment schedule and how you get one now depend on where you live.
So I rewrote this page from scratch. Here’s what Flow is, what it costs in 2026, what the evidence actually says, and who it makes sense for.
In this article
- Flow at a Glance
- What Is the Flow Headset?
- What Changed: FDA Approval and the US Launch
- Does Flow Work? What the Evidence Says
- How Much Does Flow Cost in 2026?
- The Treatment Schedule
- Can You Get Flow on the NHS?
- Who Flow Is (and Isn’t) For
- Safety and Side Effects
- Pros and Cons
- Frequently Asked Questions
- Company Details
Flow at a Glance
| What it is | A tDCS headset plus a companion app, for depression |
| Approvals | CE-marked medical device (EU/UK since 2019); FDA premarket approval (Dec 2025) |
| UK price | £399 to buy, or £79/month to rent |
| EU price | €459 to buy, or €89/month to rent |
| US access | Prescription only, since September 2026 |
| Session | 30 minutes, guided by the app |
| Guarantee | 30-day money-back (UK/EU), 2-year warranty on purchase |
| My rating | 4/5: the best-evidenced home tDCS headset, not the cheapest |
What Is the Flow Headset?
Flow is made by Flow Neuroscience, a Swedish company founded in 2016 by clinical psychologist Daniel Månsson and neuroscientist Erik Rehn.
The headset sits across your forehead and delivers a weak, steady current to the left dorsolateral prefrontal cortex (DLPFC). That’s the region that tends to be underactive in depression. If tDCS is new to you, start with what tDCS therapy actually is.
What sets Flow apart from most tDCS devices is the package. You don’t choose electrode positions or current settings. The montage is fixed, and the app runs your schedule, tracks your mood and adds short behavioural therapy courses.
That’s a feature if you want a medical treatment. It’s a limitation if you want to experiment.
What Changed: FDA Approval and the US Launch
On December 11, 2025, the FDA approved Flow’s FL-100 headset through its premarket approval (PMA) pathway, the strictest route for medical devices. It was the first at-home brain stimulation device approved in the US for depression.
The approval covers adults 18+ with moderate to severe major depressive disorder who aren’t considered treatment-resistant. It can be used alone or alongside antidepressants.
Flow then launched in the US on September 1, 2026. In the US it’s prescription only: a clinician evaluates you in person or through Flow Care, a telehealth route run by independent licensed clinicians.
For the bigger picture on what FDA approval means for tDCS, see this post and my guide to brain stimulation regulations.
Does Flow Work? What the Evidence Says
Flow’s strongest card is a large, remote, sham-controlled trial published in Nature Medicine in 2024 (Woodham et al.). It’s the study the FDA leaned on.
- Over 10 weeks of home use, roughly 58% of people on the active headset reached remission.
- Remission and response rates were about two to three times higher than with sham stimulation.
- Flow reports that people using the headset alongside antidepressants did better than those using it alone (67% vs 49% remission at 10 weeks).
Two honest caveats. First, figures like “77% improve within 3 weeks” come from Flow’s own real-world user data, not an independent trial. Second, tDCS research overall has produced mixed results, and Flow’s data is stronger than most of the field, not representative of it.
I read that as: good evidence for Flow, for depression, used as directed. Not proof that every tDCS device does the same. More on the condition itself in my major depressive disorder guide.
How Much Does Flow Cost in 2026?
Price depends on your country. Here’s what Flow’s shop lists as of October 2026.
UK and Europe
- Buy: £399 (€459). Includes the headset, a first box of pads (about 5 weeks), the app and a 2-year warranty.
- Rent: £79/month (€89/month). Pads are delivered automatically, no minimum term, cancel anytime.
- Rent-to-own: switch to ownership for £320 within the first 30 days (totalling £399), or for £199 after three months.
- Payment: Klarna or PayPal instalments are available. Shipping is free.
Either way you get a 30-day money-back guarantee, even if you’ve used the headset.
United States
This is murkier. When the FDA approved Flow, reporting put the expected US price at roughly $500 to $800. At launch, Flow didn’t publish a list price or an insurance pathway.
What I can see so far: at least one US provider sells Flow as a prescription package (headset, pads, telehealth consult and a repeat prescription) for well over $2,000 for 14 weeks. So budget for the program, not just the hardware, and ask about HSA/FSA eligibility.
Refill Pads
Flow’s refill pads are single-use cellulose pads soaked in a saline solution. They reduce resistance between your skin and the electrodes. Reusing them raises resistance and the risk of skin irritation, so don’t.
- One refill box holds 20 pad sets, roughly 5 to 10 weeks depending on your schedule.
- Your first box comes with the headset.
- Renters get pads included. Buyers order more from the shop (delivery is free on two boxes).
If you’re tempted by cheap third-party “compatible” pads, read my notes on spotting unsafe tDCS gear first.
The Treatment Schedule
- Weeks 1 to 3 (activation): 30-minute sessions, 5 days a week.
- Weeks 4 to 10 (strengthening): about 3 sessions a week.
- After week 10: keep going at a maintenance pace, or step back up if symptoms return.
Most people notice changes around week 3. Flow recommends continuing for at least 6 months once it helps, since that’s when relapse risk is highest. One headset can be shared with up to 9 other people, each with their own app account.
Can You Get Flow on the NHS?
Not routinely. tDCS isn’t a standard NHS-funded treatment yet. Several NHS trusts have run Flow pilots, and Leicestershire Partnership NHS Trust expanded its crisis-care pilot using charity funding.
Flow says trial access is open to eligible people in a few areas (West London, Northamptonshire, Leicestershire) and to NHS clinicians with depression. Everyone else buys or rents privately. My UK tDCS devices guide covers the wider options.
Who Flow Is (and Isn’t) For
A good fit if you:
- Have diagnosed depression and want a non-drug option, or an add-on to medication
- Want a guided, fixed protocol instead of DIY electrode placement
- Value clinical evidence over flexibility
Probably not for you if you:
- Want to target focus, learning or other montages (see the electrode placement guide and the best Flow alternatives)
- Are mainly looking for anxiety relief: Flow is indicated for depression, and anxiety isn’t part of its approval. See can tDCS help with anxiety?
- Have treatment-resistant depression (outside the FDA indication)
Safety and Side Effects
The common side effects of tDCS are mild: tingling, itching or redness under the pads, and occasionally headache. No serious side effects have been linked to tDCS in two decades of research.
Flow advises talking to your doctor first if you’re pregnant, have epilepsy or a seizure history, metal in or near the skull, an implanted device (pacemaker, cochlear implant, neurostimulator), broken or irritated skin on the forehead, or current thoughts of self-harm.
If you’re in crisis, please contact a doctor or emergency services rather than relying on any device.
Pros and Cons
Pros
- FDA-approved and CE-marked, backed by a large Nature Medicine trial
- Dead simple: fixed placement, app-guided sessions
- Rental and rent-to-own options, plus a 30-day money-back guarantee
- Shareable with up to 9 other users
Cons
- One montage only: depression, nothing else
- Ongoing pad costs if you buy
- US access requires a prescription, and US pricing is still unclear
Frequently Asked Questions
Is the Flow headset FDA approved?
Yes. The FDA approved Flow FL-100 in December 2025 for adults with moderate to severe major depressive disorder who aren’t treatment-resistant. It’s been sold in the US by prescription since September 2026.
Do I need a prescription for Flow?
In the US, yes. In the UK and EU you can buy or rent it directly, though Flow recommends staying under a doctor’s care for depression.
How long does a box of Flow pads last?
A box holds 20 single-use pad sets. That’s about 4 weeks in the 5-sessions-a-week phase, and longer once you drop to around 3 sessions a week.
Does Flow work for anxiety?
Flow is designed and approved for depression. Some people with depression also report less anxiety, but anxiety isn’t an approved indication.
Should I buy a second-hand Flow headset?
Be careful. Used units turn up on resale sites, some listed without an activation code, and you lose the warranty and money-back guarantee. Renting is often the safer low-cost way to try it.
What are the best alternatives to Flow?
It depends on your goal and budget. I compare them in the best Flow Neuroscience alternatives.
Company Details
Company: Flow Neuroscience AB, founded 2016
Website: flowneuroscience.com
Email: support@flowneuroscience.com
Address: Södra Förstadsgatan 2, 211 43 Malmö, Sweden
This review is for information only and isn’t medical advice. See our medical disclaimer. Prices checked October 2026 and may change.