Is bad breath tester profitable to sell on Amazon United States?

The niche generates $79K/yr across 26 tracked products. 1 of 12 products launched in the last 360 days are still selling. 90-day search growth is -11.1%. Flapen's verdict: Worth a look (58/100).

How competitive is the bad breath tester niche?

17 brands and 41 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 65% of demand.

What do buyers complain about in bad breath tester?

Top complaints mined from reviews: Functionality-Overall, Breathability, Value For Money. The return rate is 0.1%.

When does demand for bad breath tester peak?

Demand is steady year-round — the busiest month runs 1.4× the quietest.

What does it cost to enter the bad breath tester niche?

Listings span $5.38–$59.77; the average listing price is $34.77 (sweet spot $15–$100). The average incumbent carries 1,861 reviews — the moat a new listing must climb.

bad breath tester

Worth a look

Shows beatable incumbent ratings (3.5★), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Quality gap

Incredible3.5★

avg incumbent rating — lower means beatable quality

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Avg price

Incredible$34.77

avg listing price — sweet spot $15–$100

Price range

Great$5.38–$59.77

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

Brand share

Good65%

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

Competition

Good51%

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

Conversion

Good4.7%

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

Review moat

Okay1,860.65

avg incumbent reviews — the moat a new listing must climb

Market size

Bad$79K

$79K/yr · 49K searches

Growth

Bad-11.1%

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

Signals Low Review Barrier Quality Gap Out of Stock

According to Flapen's Amazon United States niche tracking, bad breath tester is a $79K/yr Amazon United States market (49K searches/yr). The top 5 brands hold 65% of demand. Verdict: Worth a look — 58/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

bad breath tester market data

Units sold / yr: 2K–2K; avg 0–100/product
Revenue / yr: $52K–$70K; units × avg price
Conversion rate: 4.7%
Avg BSR: #135
Page quality: 0%
Prime: 96%
Sponsored: 88%
Out of stock: 35.6%
Avg brand age: 45 months
Avg seller age: 157 days

Competition & brand share

The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 falling

Sellers

Top-5 brand share

65%

Top 20: 100%

Top-5 click share

51%

Top 20: 92%

Open market

29%

Famkeler24%
coolker12%
Anntoo12%
Aunnhon10%
Ujhosld8%
Gemusve5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -11.1% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top bad breath tester search terms

bad breath tester21K/yr -2.2%2.7% conv.
bad breath detector11K/yr +3.8%2.7% conv.
halimeter7K/yr -8.6%1.9% conv.
breath tester4K/yr +3.5%1.6% conv.
halimeter for bad breath3K/yr -63.1%2.3% conv.
breath odor detector2K/yr -75.8%3.2% conv.

All search terms

Top bad breath tester 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Oral Odor Freshening Detector Personal Bad Smell Checker Portable Oral Odor Freshening Rate Detector for Oral Health Real - Time Odor Checking 32 - bit CPU for Accurate Monitoring

Famkeler$45.573.4★5 rev

Bad Breath Tester Portable Instant Mouth Odor Detector Bad Breath Analyzer for Oral Health Check (White 2)

coolker$26.641.8★9 rev

Bad Breath Tester Smart Breath Odor Detector Portable Contactless Bad Breath Checker USB Charging Display Bad Breath Level/Gas Concentration/Social Distance (White)

Ujhosld$41.433.5★44 rev

Portable Bad Breath Tester Semiconductor Breath Analyzer with Backlit LCD Cartoon Display 0-4 Level Oral Odor Detector Mini Personal Oral Hygiene Checker for Travel Business and Daily Self-Check

Anntoo$34.545.0★12 rev

Professional Bad Oral Odor Freshening Rate Detector & Oral Odor Checker - Advanced Smart Oral Odor Monitor for Easy Personal Oral Cavity Care - Black

Gemusve$46.665.0★4 rev

Newest

by launch date

Portable Bad Breath Detector Kit Personal Oral Cavity Smell Checker & Odor Monitor Tool for Daily Household Oral Care Testing

Anntoo$34.782 rev

2mo ago

Oral Odor Breath Checker Personal Oral Freshness Tester Rechargeable Portable Bad Breath & Oral Odor Detector Professional Breath Odor Checker Tool for Accurate Oral Odor Detection

Aunnhon$35.461 rev

2mo ago

Futry Bad Breath Tester Portable Oral Odor Detector with MEMS Sensor Pop-Up Hygienic Probe 4-Level Breath Odor Check USB-C Rechargeable Breath Tester for Daily Oral Care White

Futry$59.774 rev

3mo ago

Oral Odor Freshening Detector Personal Bad Smell Checker Portable Oral Odor Freshening Rate Detector for Oral Health Real - Time Odor Checking 32 - bit CPU for Accurate Monitoring

Famkeler$45.575 rev

5mo ago

Oral Odor Breath Detector Professional Odor Freshening Breath Tester - Portable Oral Odor Breath Checker | Personal Oral Cavity Testing Monitor for Personal Oral Cavity

Aunnhon$39.292 rev

5mo ago

What buyers say about bad breath tester

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

What buyers love

Breathability39%

“Keeps my breath fresh”

Ease Of Use15%

“Easy to use”

Quality-Overall8%

“Quality Quick fix”

Advertised Vs Actual Product6%

“Item arrived as described”

Smell5%

“Its great breath smells great”

Size-Overall5%

“fit so nicely in my purse”

Value For Money5%

“Great Value”

Efficiency3%

“These sprays work well for me”

Durability2%

“They last a while”

Compactness2%

“Love this product compact easy to use”

What buyers complain about

Functionality-Overall18%

“There not useful at all”

Breathability16%

“Its like buying bad breath in a bottle”

Value For Money10%

“Just like the ones you get at the gas station just much more expensive”

Size-Overall7%

“Small size”

Durability5%

“Didnt last”

Quality-Overall5%

“the quality has slipped”

Adhesion/Stickiness4%

“Dont buy, not worth it, out of all 3 packs only one was good the other two packs are tough and all the strips sticking to each other”

Flavor3%

“Not long lasting Flavor”

Smell3%

“he doesnt smell like cigarettes”

Hard Feel3%

“It was hard”

Top return reasons

Breathability27%

Functionality-Overall22%

Advertised Vs Actual Product8%

Defective Material/Parts8%

Value For Money7%

Smell5%

Language Issues3%

Leak-Proof2%

Quality-Overall2%

Size-Overall2%

Common questions

Is bad breath tester profitable to sell on Amazon United States?: The niche generates $79K/yr across 26 tracked products. 1 of 12 products launched in the last 360 days are still selling. 90-day search growth is -11.1%. Flapen's verdict: Worth a look (58/100).
How competitive is the bad breath tester niche?: 17 brands and 41 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 65% of demand.
What do buyers complain about in bad breath tester?: Top complaints mined from reviews: Functionality-Overall, Breathability, Value For Money. The return rate is 0.1%.
When does demand for bad breath tester peak?: Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the bad breath tester niche?: Listings span $5.38–$59.77; the average listing price is $34.77 (sweet spot $15–$100). The average incumbent carries 1,861 reviews — the moat a new listing must climb.