---
title: "Basal Body Thermometer — $931K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/basal-body-thermometer"
last_updated: "2026-08-09T14:24:06.634Z"
locale: en
meta:
description: "Niche score 48/100 · $931K/yr market · 535K searches/yr · $16.33 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · $931K/yr market · 535K searches/yr · $16.33 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Basal Body Thermometer — $931K/yr Amazon US Niche (2026) - Flapen"
---
# **basal body thermometer**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 76Growth 20Conversion 90Competition 8Returns 81Price range 76Avg price 78Brand share 0Review moat 20Quality gap 68
**Conversion**
**Great****10.7%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Great****1.7%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$16.33**
avg listing price — sweet spot $15–$100
**Market size**
**Great****$931K**
$931K/yr · 535K searches
**Price range**
**Great****$7.61–$38.12**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-10.8%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****13,220.13**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****90%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, basal body thermometer is a $931K/yr Amazon United States market (535K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 48/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **basal body thermometer market data**
- **Units sold / yr**
- **50K–60K**
- avg 6,000–8,000/product
- **Revenue / yr**
- **$817K–$980K**
- units × avg price
- **Conversion rate**
- **10.7%**
- **Avg BSR**
- **#4**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **88%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **62 months**
- **Avg seller age**
- **175 days**
## **Competition & brand share**
The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **▼falling
**Sellers**
**9**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**90%**
Top 20: 100%
**Open market**
**0%**
- Easy@Home57% - Boncare22% - iProvèn16% - Wondfo6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -10.8% search growth over the last 90 days.
13K8KSpike '25Prime Day '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/health-household/basal-body-thermometer/trend)
## **Top basal body thermometer search terms**
- **basal body thermometer for ovulation**171K/yr-11.1%12.0% conv. - **bbt thermometer for ovulation**83K/yr+2.8%11.1% conv. - **basal body thermometer**80K/yr-27.7%9.1% conv. - **bbt thermometer**34K/yr-23.1%9.3% conv. - **basal thermometer**24K/yr-21.1%9.2% conv. - **bbt**21K/yr+10.2%3.3% conv. - **basal thermometer for ovulation**16K/yr+4.4%7.7% conv. - **ovulation thermometer**16K/yr+20.7%6.1% conv. - **basal body temperature thermometer**13K/yr-11.5%8.9% conv. - **basil body temp thermometer**8K/yr+25.2%10.8% conv. [**All search terms **](https://flapen.com/research/us/health-household/basal-body-thermometer/search-terms)
## **Top basal body thermometer 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.
0%15%$140K30%$279K45%$419K60%$558K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 8 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Easy@Home Digital Basal Thermometer for Ovulation: Backlight LCD Display 1/100th Degree High Precision BBT Memory Recall NOT Bluetooth Enabled Scan Results with Premom Fertility Tracker App Blue**Easy@Home**$13.95**4.3★9,709 rev](https://www.amazon.com/dp/B07KG9MNYZ) [2**Boncare 9 Seconds Basal Body Thermometer for Ovulation (Rice-White)**Boncare**$14.23**4.3★2,865 rev](https://www.amazon.com/dp/B0D5Q7TNCG) [3**Digital Basal Body Thermometer 1/100th Degree High Precision Quick 60-Sec Reading Memory Recall Accurate BBT Thermometer for Natural Ovulation Tracking by iProven**iProvèn**$9.23**4.2★7,147 rev](https://www.amazon.com/dp/B06XTVZ8WY) [4**Easy@Home Basal Body Thermometer: BBT for Fertility Prediction with Memory Recall- Accurate Digital Basal Thermometer for Temperature Monitoring with Premom App - EBT-018**Easy@Home**$9.05**4.3★3,265 rev](https://www.amazon.com/dp/B09FXLBRT8) [5**Easy@Home Ovulation Test Kit: 50 Ovulation Strips & 20 Early Pregnancy Tests & One Basal Body Thermometer & Urine Cups**Easy@Home**$26.83**4.6★78,399 rev](https://www.amazon.com/dp/B09SLPVTYR)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Wondfo Basal Body Thermometer for Ovulation BBT Thermometer with Face Indicator 60s Fast Reading 30 Memory Recall High Precision Fertility Thermometer Waterproof**Wondfo**$11.57**158 rev8mo ago](https://www.amazon.com/dp/B0FXGDQBX6) [**Wondfo Digital Basal Thermometer for Women Fertility BBT Thermometer for Ovulation & Pregnancy Tracking High Accuracy & LCD Display & Waterproof**Wondfo**$7.61**158 rev1y ago](https://www.amazon.com/dp/B0DQL3J34L) [**Boncare 9 Seconds Basal Body Thermometer for Ovulation (Rice-White)**Boncare**$14.23**2,865 rev2y ago](https://www.amazon.com/dp/B0D5Q7TNCG) [**Easy@Home Ovulation Test Kit: 50 Ovulation Strips & 20 Early Pregnancy Tests & One Basal Body Thermometer & Urine Cups**Easy@Home**$26.83**78,399 rev4y ago](https://www.amazon.com/dp/B09SLPVTYR) [**Easy@Home Basal Body Thermometer: BBT for Fertility Prediction with Memory Recall- Accurate Digital Basal Thermometer for Temperature Monitoring with Premom App - EBT-018**Easy@Home**$9.05**3,265 rev4y ago](https://www.amazon.com/dp/B09FXLBRT8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Wondfo Basal Body Thermometer for Ovulation BBT Thermometer with Face Indicator 60s Fast Reading 30 Memory Recall High Precision Fertility Thermometer Waterproof**Wondfo**$11.57**4.3★**▲ 227%**](https://www.amazon.com/dp/B0FXGDQBX6) [**Easy@Home Digital Basal Thermometer for Ovulation: Backlight LCD Display 1/100th Degree High Precision BBT Memory Recall NOT Bluetooth Enabled Scan Results with Premom Fertility Tracker App Blue**Easy@Home**$13.95**4.3★**▲ 21%**](https://www.amazon.com/dp/B07KG9MNYZ) [**Easy@Home Smart Basal Thermometer for Women: Digital BBT Auto Sync with Premom App - Large Screen and Backlit Body Temperature - FSA Eligible Charting Precise Fertility Prediction | EBT-300**Easy@Home**$38.12**4.4★**— 1%**](https://www.amazon.com/dp/B0764LHSNM) [**Easy@Home Basal Body Thermometer: BBT for Fertility Prediction with Memory Recall- Accurate Digital Basal Thermometer for Temperature Monitoring with Premom App - EBT-018**Easy@Home**$9.05**4.3★**— 6%**](https://www.amazon.com/dp/B09FXLBRT8) [**Boncare 9 Seconds Basal Body Thermometer for Ovulation (Rice-White)**Boncare**$14.23**4.3★**— 7%**](https://www.amazon.com/dp/B0D5Q7TNCG)
**~~View all trending →~~**
## **What buyers say about basal body thermometer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**22%
*“Easy and convenient”*
**Temperature Control**20%
*“Works well and takes accurate temperature readings”*
**Accuracy-Overall**10%
*“Accurate and easy to use”*
**Quality-Overall**8%
*“Good quality and seems quite accurate”*
**Display-Overall**6%
*“simple display”*
**Value For Money**5%
*“Excellent value for money”*
**Efficiency**4%
*“Works perfectly”*
**Advertised Vs Actual Product**3%
*“Exactly what I needed”*
**Comfort-Overall**3%
*“comfortable to hold”*
**Health Monitoring**2%
*“It makes monitoring your health much easier”*
### **What buyers complain about **
**Temperature Control**14%
*“it is a bit complicated to use based on what it does which is simply to take a temperature”*
**Measurement/Reading Accuracy**11%
*“Extremely inaccurate”*
**Accuracy-Overall**11%
*“Dubious accuracy”*
**Battery Life**10%
*“Short Battery Life”*
**Functionality-Overall**8%
*“Not functional”*
**Durability**5%
*“Doesnt last”*
**Quality-Overall**5%
*“Trash”*
**Ease Of Use**4%
*“Not user friendly”*
**Value For Money**2%
*“Waste of money”*
**Touch/Button Controls**2%
*“Setting button never worked”*
### **Top return reasons **
**Measurement/Reading Accuracy**29%
**Functionality-Overall**18%
**Heating**8%
**Temperature Control**7%
**Accuracy-Overall**6%
**Value For Money**6%
**Advertised Vs Actual Product**4%
**Connectivity-Overall**3%
**Display-Overall**3%
**Defective Material/Parts**2%
## **Common questions**
- **Is basal body thermometer profitable to sell on Amazon United States?**
- The niche generates $931K/yr across 8 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -10.8%. Flapen's verdict: Skip it (48/100).
- **How competitive is the basal body thermometer niche?**
- 4 brands and 9 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in basal body thermometer?**
- Top complaints mined from reviews: Temperature Control, Measurement/Reading Accuracy, Accuracy-Overall. The return rate is 1.7%.
- **When does demand for basal body thermometer peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the basal body thermometer niche?**
- Listings span $7.61–$38.12; the average listing price is $16.33 (sweet spot $15–$100). The average incumbent carries 13,220 reviews — the moat a new listing must climb.
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