Is emay sleep oxygen monitor profitable to sell on Amazon United States?

The niche generates $445K/yr across 10 tracked products. 90-day search growth is +8.8%. Flapen's verdict: Skip it (40/100).

How competitive is the emay sleep oxygen monitor niche?

5 brands and 10 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in emay sleep oxygen monitor?

Top complaints mined from reviews: Durability, Measurement/Reading Accuracy, Functionality-Overall. The return rate is 2.4%.

What does it cost to enter the emay sleep oxygen monitor niche?

Listings span $21.31–$198.01; the average listing price is $96.79 (sweet spot $15–$100). The average incumbent carries 31,161 reviews — the moat a new listing must climb.

emay sleep oxygen monitor

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Avg price

Great$96.79

avg listing price — sweet spot $15–$100

Returns

Good2.4%

return rate — above 5% kills the launch gate

Market size

Good$445K

$445K/yr · 176K searches

Price range

Okay$21.31–$198.01

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

Growth

Okay+8.8%

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

Conversion

Okay2.6%

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

Competition

Bad82%

top-5 click share — a locked-up shelf

Review moat

Bad31,160.7

avg incumbent reviews — the moat a new listing must climb

Brand share

Bad100%

top-5 brand share — brand-locked demand

Signals High Price

According to Flapen's Amazon United States niche tracking, emay sleep oxygen monitor is a $445K/yr Amazon United States market (176K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 40/100.

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

emay sleep oxygen monitor market data

Units sold / yr: 4K–5K; avg 100–250/product
Revenue / yr: $387K–$484K; units × avg price
Conversion rate: 2.6%
Avg BSR: #25
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 8.8%
Avg brand age: 30 months
Avg seller age: 170 days

Competition & brand share

The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

82%

Top 20: 100%

Open market

Wellue66%
EMAY15%
Innovo13%
Zacurate3%
HOLFENRY3%

Demand

Weekly Amazon search volume, last 20 weeks — +8.8% search growth over the last 90 days.

Open Trend

Top emay sleep oxygen monitor search terms

continuous pulse oximeter19K/yr +12.3%1.0% conv.
continuous oximeter overnight8K/yr +96.0%0.7% conv.
overnight oximeter17K/yr -30.6%1.5% conv.
overnight pulse oximeter monitor13K/yr +17.3%1.5% conv.
wrist pulse oximeter13K/yr +7.3%0.5% conv.
pulse oximeter bluetooth10K/yr +16.0%2.4% conv.
bluetooth pulse oximeter10K/yr -6.5%2.8% conv.
oximeter with alarm8K/yr +1.3%1.0% conv.
continuous oxygen monitor9K/yr +3.5%1.4% conv.
overnight pulse oximeter7K/yr +43.8%1.8% conv.

All search terms

Top emay sleep oxygen monitor 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★)

All 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Wellue O2Ring-S Oxygen Monitor with Vibration Reminder Bluetooth Pulse Oximeter Tracks SPO2 and Pulse Rate 24 hrs Battery Life 4*10 Hours Built-in Memory Rechargeable Pulse Ox with Free PC & APP

Wellue$198.013.9★354 rev

EMAY Sleep Oxygen Monitor with Built-in Recording Capability | Track Continuous Blood Oxygen Levels & Pulse Rate Overnight | Provides Sleep Report & Raw Data

EMAY$48.784.3★3,237 rev

Innovo Deluxe iP900AP Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor with Alarm Plethysmograph and Perfusion Index

Innovo$33.434.7★50,460 rev

Wellue O2Ring Oxygen Monitor with Vibration Reminder -Bluetooth O2 Pulse Oximeter Rechargeable Continuous Recording of SpO2 & PR Blood Oxygen Saturation Tracker with Free APP & PC Reports

Wellue$154.164.1★1,354 rev

Innovo iP900BP-B Fingertip Pulse Oximeter Blood Oxygen Monitor with Free App Plethysmograph and Perfusion Index (with Bluetooth)

Innovo$38.024.5★7,103 rev

Newest

by launch date

Wellue O2Ring-S Oxygen Monitor with Vibration Reminder Bluetooth Pulse Oximeter Tracks SPO2 and Pulse Rate 24 hrs Battery Life 4*10 Hours Built-in Memory Rechargeable Pulse Ox with Free PC & APP

Wellue$198.01354 rev

2y ago

Pulse Oximeter - Handheld Pulse Oximeter Rechargeable Overnight Pulse Ox Continuous oxygen meter finger pulse oximeter Fingertip with Pulse o2 sat monitor finger for oxygen SpO2

HOLFENRY$91.19165 rev

3y ago

EMAY Sleep Oxygen Monitor with Built-in Recording Capability | Track Continuous Blood Oxygen Levels & Pulse Rate Overnight | Provides Sleep Report & Raw Data

EMAY$48.783,237 rev

4y ago

Wellue O2 Pulse Oximeter with Smart Reminder | Blood Oxygen Saturation Monitor for SpO2 and Heart Rate Tracking Continuously Bluetooth Finger Ring with Free APP &PC Report Style 1

Wellue$195.98875 rev

5y ago

Wellue O2Ring Oxygen Monitor with Vibration Reminder -Bluetooth O2 Pulse Oximeter Rechargeable Continuous Recording of SpO2 & PR Blood Oxygen Saturation Tracker with Free APP & PC Reports

Wellue$154.161,354 rev

5y ago

What buyers say about emay sleep oxygen monitor

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

What buyers love

Ease Of Use19%

“Easy to operate”

Quality-Overall14%

“Quality and ease of use”

Efficiency13%

“Works Perfectly”

Accuracy-Overall10%

“Accurate and easy”

Advertised Vs Actual Product10%

“Exactly as advertised”

Value For Money8%

“Fair price”

Health Monitoring4%

“Accurate health tool”

Durability2%

“durable products”

Battery Life2%

“The battery life is really nice”

Display-Overall1%

“Display good”

What buyers complain about

Durability13%

“Broke after a few uses”

Measurement/Reading Accuracy12%

“Inaccurate readings”

Functionality-Overall12%

“Does not function well”

Accuracy-Overall9%

“Not Accurate”

Value For Money5%

“A little pricey”

Battery Life5%

“Batteries die very fast”

Quality-Overall5%

“Not good quality”

Software/Application3%

“APP IS NOT USABLE”

Charging2%

“Cannot be charged”

Ease Of Use2%

“Difficult to use”

Top return reasons

Measurement/Reading Accuracy28%

Functionality-Overall22%

Accuracy-Overall9%

Advertised Vs Actual Product7%

Size-Overall6%

Display-Overall4%

Connectivity-Overall3%

Value For Money3%