Lumen Metabolism Tracker
Skip itSoft demand (-47.0% this quarter) — this niche doesn't clear our bar today.
Quality gap
Incredible3.9★avg incumbent rating — lower means beatable quality
Avg price
Great$100.06avg listing price — sweet spot $15–$100
Returns
Good2.3%return rate — above 5% kills the launch gate
Price range
Okay$10.12–$313.16cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Review moat
Bad5,351avg incumbent reviews — the moat a new listing must climb
Competition
Bad74%top-5 click share — a locked-up shelf
Market size
Bad$38K$38K/yr · 62K searches
Conversion
Bad0.6%search→purchase rate — share of searches ending in a sale
Growth
Bad-47.0%90-day search growth — must beat 0% to launch
Is lumen metabolism tracker profitable on Amazon?
According to Flapen's Amazon United States niche tracking, lumen metabolism tracker is a $38K/yr Amazon United States market (62K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Skip it — 31/100.
Data updated Jul 14, 2026 · scored weekly · How we score niches
lumen metabolism tracker market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 500–750
- avg 0–100/product
- Revenue / yr
- $50K–$75K
- units × avg price
- Conversion rate
- 0.6%
- Avg BSR
- #646
- Page quality
- 0%
- Prime
- 93%
- Sponsored
- 86%
- Out of stock
- 25.6%
- Avg brand age
- 40 months
- Avg seller age
- 173 days
Competition: brands, sellers & click share
The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 falling
Sellers
16
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
74%
Top 20: 100%
Open market
7%
- KETOSCAN37%
- VNEXFU25%
- Yugoo11%
- Lumen9%
- Keto-Mojo7%
- EEKETONE4%
- Open — no brand owns it (3 brands, 7%)
lumen metabolism tracker demand & seasonality
Weekly Amazon search volume, last 104 weeks — -47.0% search growth over the last 90 days.Peak months: Oct, Nov, Dec · busiest ÷ quietest = 3.9×
Top lumen metabolism tracker search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- lumen metabolism tracker device53K/yr
- lumen metabolism tracker4K/yr
- metabolism tracker3K/yr
- metabolism tracker device3K/yr
Top lumen metabolism tracker products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
KETOSCAN Mini V2 Breath Ketone Meter | Non-Invasive Ketone Monitor Keto & Low Carb Diet Tracker Fat Metabolism & Ketosis
KETOSCAN$142.484.0★1,005 rev
Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #7
VNEXFU$39.313.8★27 rev
Upgraded Breath Ketone Meter Professional Ketone Breath Analyzer Accuracy Ketosis Breath Tester Breath Ketosis Meter for Keto Lifestyle & Fitness Trace
Yugoo$75.973.8★34 rev
Lumen Metabolism Tracker Device - Measure Real-Time Fat & Carb Burn Daily Nutrition Meal Plans Metabolic Health Weight Loss Athletic Fitness & Performance for Men & Women w/ 12 Month Subscription
Lumen$313.164.0★93 rev
KETOSCAN SMART Breath Ketone Meter | Self-Replace Sensor Ketone Monitor for Keto & Low Carb Diet Fat Metabolism Tracker
KETOSCAN$178.643.7★45 rev
Newest
by launch dateSmart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #7
VNEXFU$39.3127 rev
Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #10
VNEXFU$44.1827 rev
Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #6
VNEXFU$43.052 rev
Lumen Metabolism Tracker Device - Measure Real-Time Fat & Carb Burn Daily Nutrition Meal Plans Metabolic Health Weight Loss Athletic Fitness & Performance for Men & Women w/ 3 Month Subscription
Lumen$243.4193 rev
Lumen Metabolism Tracker Device - Measure Real-Time Fat & Carb Burn Daily Nutrition Meal Plans Metabolic Health Weight Loss Athletic Fitness & Performance for Men & Women w/ 12 Month Subscription
Lumen$313.1693 rev
Trending
90-day click momentumSmart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #10
VNEXFU$44.183.8★
Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #6
VNEXFU$43.053.0★
Smart Ring for Women Men Health Tracker - IP68 Waterproof Fitness Ring with Sleep Tracker/Heart Rate/Blood Pressure/Blood Oxygen/Step Counting/Calories for iOS & Android No Subscription Fee Gold #7
VNEXFU$39.313.8★
KETOSCAN SMART Breath Ketone Meter | Self-Replace Sensor Ketone Monitor for Keto & Low Carb Diet Fat Metabolism Tracker
KETOSCAN$178.643.7★
Keto Breath Meter Tracing Diet Ketosis Status Keto Breath Analyzer with 10 Mouthpieces
EEKETONE$28.992.4★
What reviews say buyers love and hate about lumen metabolism tracker
What buyers praise and complain about, mined from review topics.What buyers love
“easy to carry”
“Accurate and Easy”
“As described”
“Good Value”
“Excellent product”
“this is the perfect way to easily monitor my health progress”
“Easy to follow instructions”
“Does the job”
“Its simple, accurate, and really helps keep me accountable”
“Great tool for tracking glucose”
What buyers complain about
“Did not work”
“Not for accurate readings”
“Not at all accurate”
“Very expensive”
“Color is off”
“Not Durable at all”
“difficult to navigate”
“This is either poor quality control, a mfg”
“Battery dies after every use”
“No help in the directions eg Blue is this”
Top return reasons
Common lumen metabolism tracker questions
- Is lumen metabolism tracker profitable to sell on Amazon United States?
- The niche generates $38K/yr across 14 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -47.0%. Flapen's verdict: Skip it (31/100).
- How competitive is the lumen metabolism tracker niche?
- 9 brands and 16 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in lumen metabolism tracker?
- Top complaints mined from reviews: Functionality-Overall, Measurement/Reading Accuracy, Accuracy-Overall. The return rate is 2.3%.
- When does demand for lumen metabolism tracker peak?
- Demand peaks in Oct–Nov–Dec; the busiest month runs 3.9× the quietest.
- What does it cost to enter the lumen metabolism tracker niche?
- Listings span $10.12–$313.16; the average listing price is $100.06 (sweet spot $15–$100). The average incumbent carries 5,351 reviews — the moat a new listing must climb.