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47

medical grade infant thermometers

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Soft demand (-45.2% this quarter) — this niche doesn't clear our bar today.

Market size 7Growth 2Conversion 64Competition 68Returns 93Price range 82Avg price 94Brand share 50Review moat 17Quality gap 48

Avg price

Great$22.75

avg listing price — sweet spot $15–$100

Returns

Great1.1%

return rate — above 6% kills the launch gate

Price range

Great$6.88–$58.25

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

Competition

Good44%

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

Conversion

Good5.6%

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

Brand share

Okay75%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Review moat

Bad19,259.48

avg incumbent reviews — the moat a new listing must climb

Market size

Bad$29K

$29K/yr · 23K searches

Growth

Bad-45.2%

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

Competition

The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 rising

Sellers

53

Top-5 brand share

75%

Open market

18%

  • GoodBaby27%
  • Frida18%
  • Braun16%
  • Boncare8%
  • iProvèn7%
  • Momcozy7%
  • Open — no brand owns it (9 brands, 18%)

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%3%$8806%$2K9%$3K12%$4K101001K10K100K1.0M Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 29 tracked products in this niche — three views at once, no toggling.

Demand

Weekly Amazon search volume, last 14 weeks — -45.2% search growth over the last 90 days.
500300Spike '26Apr '26Apr '26May '26May '26May '26Jun '26Jun '26

Reviews

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

What buyers love

Ease Of Use28%

“Easy To Use”

Temperature Control16%

“Good temperature reading easy to use very speedy reading good value”

Quality-Overall9%

“The quality feels great and reliable”

Value For Money8%

“Great buy”

Accuracy-Overall6%

“Accurate and easy to use”

Advertised Vs Actual Product5%

“As described”

Efficiency4%

“Works perfectly”

Display-Overall2%

“has a clear, easy-to-read display”

Design-Overall1%

“The design is sleek”

Battery Life1%

“Long battery life”

What buyers complain about

Measurement/Reading Accuracy26%

“Bad readings”

Temperature Control11%

“does not record temperature”

Functionality-Overall10%

“DOESNT WORK”

Durability7%

“Did not last”

Accuracy-Overall6%

“NOT ACCURATE”

Quality-Overall6%

“Cheap quality”

Battery Life5%

“Poor battery life”

Value For Money3%

“A little pricey”

Ease Of Use2%

“Hard to read”

Advertised Vs Actual Product2%

“This is very misleading”

Top return reasons

Measurement/Reading Accuracy33%
Functionality-Overall18%
Value For Money7%
Temperature Control6%
Heating5%
Advertised Vs Actual Product5%
Accuracy-Overall4%
Product Condition4%
Display-Overall3%
Defective Material/Parts2%