peak flow meter
Skip itA concentrated shelf (top 5 take 91% of clicks) — this niche doesn't clear our bar today.
Quality gap
Incredible3.9★avg incumbent rating — lower means beatable quality
Avg price
Incredible$33.82avg listing price — sweet spot $15–$100
Price range
Great$12.27–$58.98cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great9.9%search→purchase rate — share of searches ending in a sale
Review moat
Great299.88avg incumbent reviews — the moat a new listing must climb
Market size
Good$397K$397K/yr · 119K searches
Returns
Okay3.3%return rate — above 5% kills the launch gate
Growth
Bad-14.0%90-day search growth — must beat 0% to launch
Competition
Bad91%top-5 click share — a locked-up shelf
Brand share
Bad97%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, peak flow meter is a $397K/yr Amazon United States market (119K searches/yr). The top 5 brands hold 97% of demand. Verdict: Skip it — 49/100.
Data updated Jul 11, 2026 · scored weekly · How we score niches
peak flow meter market data
- Units sold / yr
- 8K–10K
- avg 1,000–1,250/product
- Revenue / yr
- $271K–$338K
- units × avg price
- Conversion rate
- 9.9%
- Avg BSR
- #1,032
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 5.1%
- Avg brand age
- 50 months
- Avg seller age
- 142 days
Competition & brand share
The top 5 products capture 91% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
16
Top-5 brand share
97%
Top 20: 100%
Top-5 click share
91%
Top 20: 100%
Open market
0%
- Nascool52%
- Holdly25%
- Microlife10%
- Sonmol8%
- Klanata3%
- Navnihaal3%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -14.0% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top peak flow meter search terms
- peak flow meter57K/yr
- peak flow meter adult33K/yr
- peak flow meter asthma13K/yr
- peak flow meter for kids7K/yr
- peak-flow meter4K/yr
- peak flow4K/yr
Top peak flow meter 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 8 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Nascool Peak Flow Meter for Adults & Kids
Nascool$29.414.4★669 rev
Mechanical Peak Flow Meter | PEF Tester - Track & Monitor Peak Expiratory Flow Changes
Holdly$19.733.9★86 rev
Sonmol Digital Peak Flow Meter PEF FEV1 Tester with Color Indicators
Sonmol$39.984.5★53 rev
Microlife (Deluxe Kit) Digital Peak Flow Meter Tests PEF / FEV1 / Early Detection of Asthma Attacks | Spirometer for Kids & Adults | Perfect for Monitoring Asthma COPD & other Lung Conditions at Home
Microlife$43.214.3★1,487 rev
Bluetooth Peak Flow Meter Digital PEF FEV1 Monitor for Asthma
Nascool$58.984.3★70 rev
Newest
by launch date
Klanata Peak Flow Meter Rotameters Plastic Plastic Tube Type Adult 100 1000L H Water Flow Meter Flowmeter Lzs 15
Klanata$12.271 rev
Mechanical Peak Flow Meter | PEF Tester - Track & Monitor Peak Expiratory Flow Changes
Holdly$19.7386 rev
Navnihaal Breath-O-Meter Peak Flow Meter White
Navnihaal$22.7926 rev
Sonmol Digital Peak Flow Meter PEF FEV1 Tester with Color Indicators
Sonmol$39.9853 rev
Bluetooth Peak Flow Meter Digital PEF FEV1 Monitor for Asthma
Nascool$58.9870 rev
Trending
90-day click momentumBluetooth Peak Flow Meter Digital PEF FEV1 Monitor for Asthma
Nascool$58.984.3★
Mechanical Peak Flow Meter | PEF Tester - Track & Monitor Peak Expiratory Flow Changes
Holdly$19.733.9★
Klanata Peak Flow Meter Rotameters Plastic Plastic Tube Type Adult 100 1000L H Water Flow Meter Flowmeter Lzs 15
Klanata$12.271.0★
Microlife Digital Peak Flow Meter Tests PEF / FEV1 / Early Detection of Asthma Attacks (Spirometer for Kids & Adults) Device for Monitoring Asthma COPD & Other Lung Conditions
Microlife$44.194.0★
Nascool Peak Flow Meter for Adults & Kids
Nascool$29.414.4★
What buyers say about peak flow meter
What buyers praise and complain about, mined from review topics.What buyers love
“Very easy to use and accurate”
“Good item, functions well”
“Works fine”
“Great value”
“It is best for people with breathing conditions like asthma”
“Durable”
“Cleaning is a breeze”
“this is the best peak flow meter”
“The device itself works good”
“Nice size”
What buyers complain about
“Breaks easily”
“It does not function properly”
“Felt cheap and did not have confidence in the results”
“Will not sync to my phone”
“The red, yellow, green marking on it in the picture is just a marking with no function”
“Also, the instructions for setting up the device don't always match the actual process”
“connection fucntion no way to place in pairing mode”
“Item does not work at all”
“NOT WORTH THE MONEY”
“I do not find it user friendly”
Top return reasons
Common questions
- Is peak flow meter profitable to sell on Amazon United States?
- The niche generates $397K/yr across 8 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -14.0%. Flapen's verdict: Skip it (49/100).
- How competitive is the peak flow meter niche?
- 6 brands and 16 sellers compete. The top 5 products take 91% of clicks and top 5 brands hold 97% of demand.
- What do buyers complain about in peak flow meter?
- Top complaints mined from reviews: Durability, Functionality-Overall, Quality-Overall. The return rate is 3.3%.
- When does demand for peak flow meter peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the peak flow meter niche?
- Listings span $12.27–$58.98; the average listing price is $33.82 (sweet spot $15–$100). The average incumbent carries 300 reviews — the moat a new listing must climb.