mold detector
Skip itA concentrated shelf (top 5 take 80% of clicks) — this niche doesn't clear our bar today.
Avg price
Incredible$27.41avg listing price — sweet spot $15–$100
Price range
Great$10.02–$48.19cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good$556K$556K/yr · 475K searches
Conversion
Good4.3%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Okay85%top-5 brand share — brands hold most of the demand
Returns
Okay4.4%return rate — above 5% kills the launch gate
Review moat
Bad4,046.64avg incumbent reviews — the moat a new listing must climb
Growth
Bad-15.7%90-day search growth — must beat 0% to launch
Competition
Bad80%top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, mold detector is a $556K/yr Amazon United States market (475K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Oct. Verdict: Skip it — 42/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
mold detector market data
- Units sold / yr
- 20K–25K
- avg 1,250–1,500/product
- Revenue / yr
- $548K–$685K
- units × avg price
- Conversion rate
- 4.3%
- Avg BSR
- #7
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 82%
- Out of stock
- 3.9%
- Avg brand age
- 48 months
- Avg seller age
- 160 days
Competition & brand share
The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 falling
Sellers
49
Top-5 brand share
85%
Top 20: 100%
Top-5 click share
80%
Top 20: 100%
Open market
12%
- General Tools39%
- KAYENQO23%
- ENESNES9%
- ERICKHILL8%
- Mold Armor6%
- Prexiso4%
- Open — no brand owns it (4 brands, 12%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -15.7% search growth over the last 90 days.Peak months: Oct · busiest ÷ quietest = 1.5×
Top mold detector search terms
- mold detector192K/yr
- mold detector for home109K/yr
- mold tester42K/yr
- mold detector meter19K/yr
- mold meter12K/yr
- mold detector device20K/yr
- black mold detector12K/yr
- mold behind wall detector16K/yr
- mold meter detector9K/yr
- mold detection7K/yr
Top mold detector 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
General Tools MMD4E Digital Moisture Meter Water Leak Detector Moisture Tester Pin Type Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts Grays
General Tools$37.554.5★15,140 rev
Mold Test Kit for Home - 12 Simple Detection Tests Test HVAC System Home Surfaces & Indoor Air Quality Testing Kits DIY Mold Detector at Home Includes Detailed Mold Identification Guide air Tester
KAYENQO$28.154.5★3,530 rev
Mold Test Kit for Home 8 Detection Tests for HVAC Surfaces & Indoor Air Quality DIY Black Mold Detector Testing kit at Home Includes Detailed Identification Guide Free Lab Analysis
ENESNES$14.624.4★824 rev
ERICKHILL Pinless Moisture Meter for Walls and Wood Non-Destructive Dampness Tester for Drywall Masonry and Building Materials 3-Color Indicator Audible Alarm Detects up to 2 Inches Deep
ERICKHILL$26.064.3★2,280 rev
MOLD ARMOR Do It Yourself Mold Test Kit
Mold Armor$10.024.0★8,980 rev
Newest
by launch date
Mold Test Kit for Home by Detekt - with 4 Mold Detection + 4 Bacteria Detection Tests for HVAC Surfaces & Indoor Air Quality - DIY Kit inlcudes Detailed Identification Guide & Free Consultation
Detekt$30.4236 rev
Mold Test Kit for Home 8 Detection Tests for HVAC Surfaces & Indoor Air Quality DIY Black Mold Detector Testing kit at Home Includes Detailed Identification Guide Free Lab Analysis
ENESNES$14.62824 rev
Mold Test Kit for Home -DIY Mold Testing Kit with 8 Individual Tests-Black Mold Detector-Indoor Air Quality Tester-Mold Identification Guide-Free Lab Analysis-Fast and Reliable Mold Detector at Home
CCNZHA$14.301,182 rev
Mold Test Kit for Home Within 8 Individual Tests DIY Detector at Home Surface Mold HVAC Indoor Air Quality Testing Kits Black Mold Testing Includes Detailed Mold Identification Guide and Free Lab
Entimp$15.211,651 rev
Mold Test Kit for Home - 12 Simple Detection Tests Test HVAC System Home Surfaces & Indoor Air Quality Testing Kits DIY Mold Detector at Home Includes Detailed Mold Identification Guide air Tester
KAYENQO$28.153,530 rev
Trending
90-day click momentumMold Test Kit for Home by Detekt - with 4 Mold Detection + 4 Bacteria Detection Tests for HVAC Surfaces & Indoor Air Quality - DIY Kit inlcudes Detailed Identification Guide & Free Consultation
Detekt$30.424.9★
MOLD ARMOR Do It Yourself Mold Test Kit
Mold Armor$10.024.0★
PREXISO Wood Moisture Meter - 7 in 1Digital Moisture Meter for Firewood Woodworking Walls Home Drywall Paper Floor - Moisture Reader Pin-Type Water Leak Detector Dampness Meter
Prexiso$29.114.4★
General Tools MMD4E Digital Moisture Meter Water Leak Detector Moisture Tester Pin Type Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts Grays
General Tools$37.554.5★
General Tools Digital Moisture Meter MMD7NP - Humidity Sensor- Pinless and Non-Invasive
General Tools$47.914.4★
What buyers say about mold detector
What buyers praise and complain about, mined from review topics.What buyers love
“easy to follow”
“Clear instructions”
“Quality kit, easy instructions, great report”
“Money well spent”
“As advertised”
“Very efficient”
“Good meter”
“The air is clean”
“The dishes worked very well”
“Effective”
What buyers complain about
“No instructions”
“Did not work”
“not as an accurate instrument”
“Description is deceptive”
“it gets expensive”
“Bad quality, dont do correct functionality,”
“Difficult to use”
“After the leak”
“clearly has a smell of mold”
“After I connected the battery it would none work or even show any power to the product”
Top return reasons
Common questions
- Is mold detector profitable to sell on Amazon United States?
- The niche generates $556K/yr across 11 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -15.7%. Flapen's verdict: Skip it (42/100).
- How competitive is the mold detector niche?
- 10 brands and 49 sellers compete. The top 5 products take 80% of clicks and top 5 brands hold 85% of demand.
- What do buyers complain about in mold detector?
- Top complaints mined from reviews: Instructions/User Manual/Troubleshooting, Functionality-Overall, Measurement/Reading Accuracy. The return rate is 4.4%.
- When does demand for mold detector peak?
- Demand peaks in Oct; the busiest month runs 1.5× the quietest.
- What does it cost to enter the mold detector niche?
- Listings span $10.02–$48.19; the average listing price is $27.41 (sweet spot $15–$100). The average incumbent carries 4,047 reviews — the moat a new listing must climb.