denneroll
Skip itBrand-locked demand (top 5 brands take 99% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$21.64avg listing price — sweet spot $15–$100
Price range
Great$11.39–$26.88cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Conversion
Good5.4%search→purchase rate — share of searches ending in a sale
Returns
Good2.8%return rate — above 5% kills the launch gate
Market size
Okay$156K$156K/yr · 135K searches
Growth
Bad-1.4%90-day search growth — must beat 0% to launch
Competition
Bad80%top-5 click share — a locked-up shelf
Review moat
Bad25,916.91avg incumbent reviews — the moat a new listing must climb
Brand share
Bad99%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, denneroll is a $156K/yr Amazon United States market (135K searches/yr). The top 5 brands hold 99% of demand. Verdict: Skip it — 40/100.
Data updated Jul 14, 2026 · scored weekly · How we score niches
denneroll market data
- Units sold / yr
- 6K–8K
- avg 500–750/product
- Revenue / yr
- $130K–$173K
- units × avg price
- Conversion rate
- 5.4%
- Avg BSR
- #27
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 0.0%
- Avg brand age
- 38 months
- Avg seller age
- 186 days
Competition & brand share
The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 rising
Sellers
14
Top-5 brand share
99%
Top 20: 100%
Top-5 click share
80%
Top 20: 100%
Open market
0%
- WANYIDA50%
- Lumia Wellness20%
- RESTCLOUD12%
- StrongTek12%
- Core Products5%
- POUYRBA2%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -1.4% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top denneroll search terms
- denneroll49K/yr
- denneroll cervical neck22K/yr
- cervical denneroll12K/yr
- neck wedge12K/yr
- neck block5K/yr
- denneroll cervical5K/yr
- cervical wedge5K/yr
- deneroll neck cervical4K/yr
- denneroll neck4K/yr
- neck wedge chiropractic3K/yr
Top denneroll products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Neck Stretcher Exerciser Cervical Traction Device for Neck Pain Relief and Cervical Spine Alignment. Portable Neck Traction Exerciser for Home/Office Neck and Shoulder Relaxer. (20-25 Pounds)
WANYIDA$24.114.0★380 rev
WANYIDA Neck and Shoulder Relaxer Neck Stretcher Chiropractic Pillows for Pain Relief Cervical Traction Device for Cervical Spine AlignmentFSA HSA Eligible
WANYIDA$24.704.4★1,287 rev
Lumia Wellness Cervical Orthotic Traction Block Firm Spinal & Neck Alignment Cervical Traction Device & Neck Stretcher
Lumia Wellness$26.684.4★2,196 rev
StrongTek Cervical Neck Wedge Firm Foam Orthotic Block for Neck Curve Restoration Support for Posture Correction Headache Relief and Cervical Traction at Home
StrongTek$21.234.3★888 rev
RESTCLOUD Neck and Shoulder Relaxer Cervical Traction Device for TMJ Pain Relief and Cervical Spine Alignment Chiropractic Pillow Neck Stretcher (Black)
RESTCLOUD$18.844.2★92,876 rev
Newest
by launch date
Yoga Blocks 2 Pcs 9x6x3 Yoga Brick Foam Blocks EVA Foam Block Props Accessories for Pilates Stretching and Meditation (Grey Large)
POUYRBA$11.39400 rev
WANYIDA Neck Stretcher Chiropractic Pillows for Neck Pain Relief Cervical Traction Device for Cervical Spine Alignment Neck and Shoulder Relaxer Cervical Orthotic Traction Block
WANYIDA$22.86130 rev
Neck Stretcher Exerciser Cervical Traction Device for Neck Pain Relief and Cervical Spine Alignment. Portable Neck Traction Exerciser for Home/Office Neck and Shoulder Relaxer. (20-25 Pounds)
WANYIDA$24.11380 rev
Neck Stretcher Exerciser FSA/HSA Eligible Cervical Traction Device for Neck Pain Relief and Spine Alignment. Portable Neck Traction Exerciser for Home/Office Neck and Shoulder Relaxer Easy to Pull.
WANYIDA$23.91380 rev
WANYIDA Neck and Shoulder Relaxer Neck Stretcher Chiropractic Pillows for Pain Relief Cervical Traction Device for Cervical Spine AlignmentFSA HSA Eligible
WANYIDA$24.701,287 rev
Trending
90-day click momentumYoga Blocks 2 Pcs 9x6x3 Yoga Brick Foam Blocks EVA Foam Block Props Accessories for Pilates Stretching and Meditation (Grey Large)
POUYRBA$11.394.8★
Neck Stretcher Exerciser Cervical Traction Device for Neck Pain Relief and Cervical Spine Alignment. Portable Neck Traction Exerciser for Home/Office Neck and Shoulder Relaxer. (20-25 Pounds)
WANYIDA$24.114.0★
Neck Stretcher Exerciser FSA/HSA Eligible Cervical Traction Device for Neck Pain Relief and Spine Alignment. Portable Neck Traction Exerciser for Home/Office Neck and Shoulder Relaxer Easy to Pull.
WANYIDA$23.914.0★
RESTCLOUD Neck and Shoulder Relaxer Cervical Traction Device for TMJ Pain Relief and Cervical Spine Alignment Chiropractic Pillow Neck Stretcher (Black)
RESTCLOUD$18.844.2★
WANYIDA Neck and Shoulder Relaxer Neck Stretcher Chiropractic Pillows for Pain Relief Cervical Traction Device for Cervical Spine AlignmentFSA HSA Eligible
WANYIDA$24.704.4★
What buyers say about denneroll
What buyers praise and complain about, mined from review topics.What buyers love
“You can feel the stretch”
“Seems well made”
“Good value”
“Effective”
“As advertised”
“pressure that helps relax tight muscles”
“Easy to use”
“Enhances neck posture”
“Amazing comfort”
“This fits well”
What buyers complain about
“Not super comfortable”
“Painful”
“Extremely hard”
“I started noticing a tighter, stiff back”
“Too small”
“its not firm”
“just didn't help”
“DO NOT use the device for sleeping”
“Too difficult to stretch out arms”
“No worth it”
Top return reasons
Common questions
- Is denneroll profitable to sell on Amazon United States?
- The niche generates $156K/yr across 11 tracked products. 90-day search growth is -1.4%. Flapen's verdict: Skip it (40/100).
- How competitive is the denneroll niche?
- 6 brands and 14 sellers compete. The top 5 products take 80% of clicks and top 5 brands hold 99% of demand.
- What do buyers complain about in denneroll?
- Top complaints mined from reviews: Comfort-Overall, Pain Relief-Overall, Hard Feel. The return rate is 2.8%.
- When does demand for denneroll peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the denneroll niche?
- Listings span $11.39–$26.88; the average listing price is $21.64 (sweet spot $15–$100). The average incumbent carries 25,917 reviews — the moat a new listing must climb.