- Flapen Score
- 22 / 100Ranks 14,707 of 14,768 Health & Household niches · −27 vs the category median of 4922
- Market size
- $8K/yr39K searches / yr
- 90-day growth
- -12.4%search demand this quarter
- Competition
- 94%top-5 click share · 7 brands · 32 sellers
Flapen Score
Tdcs against its category
The dotted line is the Health & Household average. Past it, Tdcs is stronger. Inside it, weaker.
Market
The Tdcs market on Amazon at a glance
Shoppers on Amazon United States searched for Tdcs 39K times last year and spent an estimated $8K. The top 5 brands take 94% of clicks. Flapen scores it 22 out of 100, a Fail.
01 · Demand
An estimated 0.1% of those searches ended in a purchase.
Shoppers searched for this 39K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 0.1% of those searches ended in a purchase. Searches in the last 90 days moved -12.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated $8K a year.
- Searches, last 12 months
- 39K
- Growth, 90 days vs prior 90
- -12.4%
- Conversion, latest week
- 0.1%
- Market size, estimated
- $8Ka year
- Peak month
- October1.4× the quietest month
- Top search term
- transcranial magnetic stimulation device10K searches a year
02 · Price
A sale here is worth $140.07.
Listings sell for $140.07 on average, from $33.62 to $266.80. Amazon reports units sold in ranges. This niche sold 100 to 250 a year. The average listing sells 0 to 100 of them. At $140.07 that is $0 to $14K a year per listing.
- Average price
- $140.07above the $15 to $100 sweet spot
- Price range
- $33.62–$266.80
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 100–250
- Units per listing a year
- 0–100
- Revenue per listing a year
- $0–$14K
- Returns
- 4.7%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
86% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 3.5% of listings are out of stock. The average listing ranks #2,142 within Occupational & Physical Therapy Aids. It carries 12,469 reviews at 4.26 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 86%
- Prime listings
- 100%
- Out of stock, average day
- 3.5%
- Average rank
- #2,142in Occupational & Physical Therapy Aids
- Average rating
- 4.26 starsAmazon United States average 4.42 stars
- Average reviews
- 12,469per listing
- Listings tracked
- 7
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 52 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 52 months
Products
Top Tdcs products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 14, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
KardiaMobile 1-Lead EKG Monitor Medical-Grade FDA-Cleared Personal Heart Monitor Detects Normal AFib & Arrhythmias 30 Second Results Works with Most Smartphones HSA&FSA Eligible
- Price
- $73.89
- Rating
- 4.4/5
- Reviews
- 83,279
- Age
- 10y ago

SereniBrain EEG Neurofeedback Headband for Meditation & Brainwave Monitoring Real-Time Brain Activity Tracker with App Train Focus Relaxation & Sleep Preparation
- Price
- $184.67
- Rating
- 4.0/5
- Reviews
- 98
- Age
- 2y ago

Garmin HRM 600 Premium Heart Rate Monitor Accurate Heart Rate and HRV Data Running Dynamics Stand-Alone Activity Recording M-XL
- Price
- $167.90
- Rating
- 4.6/5
- Reviews
- 1,073
- Age
- 1y ago

Balego EMS Digital Neuromuscular NMES Stimulator OTC
- Price
- $61.75
- Rating
- 4.4/5
- Reviews
- 2,273
- Age
- 8y ago

Pulsetto FIT (V2) Wellness Wearable Relaxation Sleep & Daily Wellness Support Device
- Price
- $266.80
- Rating
- 3.9/5
- Reviews
- 464
- Age
- 1y ago
Trending
estimated 90-day click momentum
KardiaMobile 1-Lead EKG Monitor Medical-Grade FDA-Cleared Personal Heart Monitor Detects Normal AFib & Arrhythmias 30 Second Results Works with Most Smartphones HSA&FSA Eligible
- Price
- $73.89
- Rating
- 4.4/5
- Reviews
- 83,279
- Age
- 10y ago

Garmin HRM 600 Premium Heart Rate Monitor Accurate Heart Rate and HRV Data Running Dynamics Stand-Alone Activity Recording M-XL
- Price
- $167.90
- Rating
- 4.6/5
- Reviews
- 1,073
- Age
- 1y ago

Pulsetto FIT (V2) Wellness Wearable Relaxation Sleep & Daily Wellness Support Device
- Price
- $266.80
- Rating
- 3.9/5
- Reviews
- 464
- Age
- 1y ago

SereniBrain EEG Neurofeedback Headband for Meditation & Brainwave Monitoring Real-Time Brain Activity Tracker with App Train Focus Relaxation & Sleep Preparation
- Price
- $184.67
- Rating
- 4.0/5
- Reviews
- 98
- Age
- 2y ago

Balego EMS Digital Neuromuscular NMES Stimulator OTC
- Price
- $61.75
- Rating
- 4.4/5
- Reviews
- 2,273
- Age
- 8y ago
Newest
by launch date
Pulsetto FIT (V2) Wellness Wearable Relaxation Sleep & Daily Wellness Support Device
- Price
- $266.80
- Rating
- 3.9/5
- Reviews
- 464
- Age
- 1y ago

Garmin HRM 600 Premium Heart Rate Monitor Accurate Heart Rate and HRV Data Running Dynamics Stand-Alone Activity Recording M-XL
- Price
- $167.90
- Rating
- 4.6/5
- Reviews
- 1,073
- Age
- 1y ago

B-Pulse Bilateral Stimulation Tool Dual Vibration Units with Adjustable Straps EMDR Therapy Device for Children and Adults
- Price
- $191.91
- Rating
- 3.9/5
- Reviews
- 49
- Age
- 1y ago

SereniBrain EEG Neurofeedback Headband for Meditation & Brainwave Monitoring Real-Time Brain Activity Tracker with App Train Focus Relaxation & Sleep Preparation
- Price
- $184.67
- Rating
- 4.0/5
- Reviews
- 98
- Age
- 2y ago

MagnetRX Magnetic Therapy Massage Fork MultiFunctional Magnetotherapy Pen for Emotion Code Magnets Meridian Massage Tool & Body Healing Magnets Magnetoterapia Fisioterapia Portatil Aparatos
- Price
- $33.62
- Rating
- 4.6/5
- Reviews
- 46
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 94% of clicks. A locked shelf that new listings rarely crack.
Brands
7 falling
Sellers
32
Est. top-5 brand share
94%
Top 20: 100%
Est. top-5 click share
94%
Top 20: 100%
Open market
3%
- AliveCor42%
- SereniBrain19%
- Garmin16%
- Balego9%
- Pulsetto6%
- MagnetRX3%
- Open — no brand owns it (1 brand, 3%)
Demand
Tdcs search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top Tdcs search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- transcranial magnetic stimulation device10K/yr
- tdcs brain stimulator9K/yr
- transcranial magnetic stimulation6K/yr
- tdcs device5K/yr
- neuromyst2K/yr
Reviews and returns
What reviews say buyers love and hate about Tdcs
We read the reviews and the return reasons for every product selling here.
“For me, no results”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
16 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Tdcs questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









