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bicep curl machine

Skip it

A small market ($100K/yr) — this niche doesn't clear our bar today.

Market size 25Growth 25Conversion 36Competition 42Returns 79Price range 39Avg price 83Brand share 72Review moat 64Quality gap 55

Avg price

Great$78.00

avg listing price — sweet spot $15–$100

Returns

Great1.8%

return rate — above 6% kills the launch gate

Brand share

Good62%

top-5 brand share — brands hold most of the demand

Review moat

Good937.8

avg incumbent reviews — the moat a new listing must climb

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Competition

Okay60%

top-5 click share — leaders hold, buyers still browse

Price range

Okay$14.59–$235.00

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Okay2.9%

search→purchase rate — share of searches ending in a sale

Market size

Bad$100K

$100K/yr · 45K searches

Growth

Bad-0.2%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United States niche tracking, bicep curl machine is a $100K/yr Amazon United States market (45K searches/yr). The top 5 brands hold 62% of demand. Verdict: Skip it — 47/100.

Data updated Jul 17, 2026 · scored weekly · How we score niches

bicep curl machine market data

Units sold / yr
750–1K
avg 0–100/product
Revenue / yr
$59K–$78K
units × avg price
Launch success
71%
5 of 7 new (360d)
Conversion rate
2.9%
Avg BSR
#137
Page quality
0%
Prime
65%
Sponsored
85%
Out of stock
16.3%
Avg brand age
42 months
Avg seller age
200 days

Competition & brand share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 falling

Sellers

23

Top-5 brand share

62%

Top 20: 100%

Top-5 click share

60%

Top 20: 100%

Open market

33%

  • SINYWAY23%
  • VEVOR18%
  • Goimu10%
  • ABMAT6%
  • Generic5%
  • ProsourceFit5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -0.2% search growth over the last 90 days.
2K1KHoliday '24Prime Day '25Black Friday '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Top bicep curl machine search terms

  • preacher curl pad27K/yr
  • bicep machine12K/yr
  • preacher pad6K/yr
All search terms

Top bicep curl machine 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.

0%10%$10K20%$20K30%$30K40%$40K101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted

All 20 tracked products in this niche — three views at once, no toggling.

What buyers say about bicep curl machine

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall23%

“The build quality is solid”

Exercise/Sports Suitability12%

“Good workout”

Ease Of Use9%

“easy to use”

Durability6%

“very durable”

Value For Money5%

“Reasonable price”

Adjustability/Rotatability/Reclining5%

“adjustable”

Grip3%

“the grips are comfortable”

Portability3%

“it's easy to transport”

Advertised Vs Actual Product3%

“Exceeded My Expectations”

Comfort-Overall3%

“It is comfortable”

What buyers complain about

Instructions/User Manual/Troubleshooting16%

“Omg the instructions are terrible”

Quality-Overall8%

“they feel a little cheap”

Ease Of Use5%

“Difficult to use”

Weight Heavy5%

“is extremely heavy”

Balance/Stability4%

“At first, my balance was a bit wobbly”

Size-Overall3%

“didnt fit well”

Hard Feel3%

“to hard”

Assembly/Installation2%

“If you have your own tools the assembly should take just over half an hour”

Strap/String Quality2%

“need some kind of strap to keep it still”

Stain Resistance1%

“Leaks hydraulic fluid and stains clothes”

Top return reasons

Size-Overall37%
Balance/Stability9%
Functionality-Overall7%
Advertised Vs Actual Product6%
Defective Material/Parts4%
Comfort-Overall4%
Value For Money4%
Strap/String Quality3%
Quality-Overall3%
Hard Feel2%

Common questions

Is bicep curl machine profitable to sell on Amazon United States?
The niche generates $100K/yr across 20 tracked products. 5 of 7 products launched in the last 360 days are still selling. 90-day search growth is -0.2%. Flapen's verdict: Skip it (47/100).
How competitive is the bicep curl machine niche?
17 brands and 23 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 62% of demand.
What do buyers complain about in bicep curl machine?
Top complaints mined from reviews: Instructions/User Manual/Troubleshooting, Quality-Overall, Ease Of Use. The return rate is 1.8%.
When does demand for bicep curl machine peak?
Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the bicep curl machine niche?
Listings span $14.59–$235.00; the average listing price is $78.00 (sweet spot $15–$100). The average incumbent carries 938 reviews — the moat a new listing must climb.