---
title: "Basal Body Temperature Thermometer — £88K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/basal-body-temperature-thermometer"
last_updated: "2026-07-31T08:59:14.114Z"
locale: en
meta:
description: "Niche score 38/100 · £88K/yr market · 103K searches/yr · £7.27 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · £88K/yr market · 103K searches/yr · £7.27 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Basal Body Temperature Thermometer — £88K/yr Amazon UK Niche (2026) - Flapen"
---
# **basal body temperature thermometer**
**Skip it**
Prices mostly outside the sweet spot ($4.37–$12.70) — this niche doesn't clear our bar today.
Market size 22Growth 14Conversion 94Competition 11Returns 96Price range 0Avg price 20Brand share 15Review moat 26Quality gap 81
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****11.8%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****3,876.67**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****£88K**
£88K/yr · 103K searches
**Avg price**
**Bad****£7.27**
avg listing price — sweet spot $15–$100
**Brand share**
**Bad****94%**
top-5 brand share — brand-locked demand
**Growth**
**Bad****-21.8%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****86%**
top-5 click share — a locked-up shelf
**Price range**
**Bad****£4.37–£12.70**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, basal body temperature thermometer is a £88K/yr Amazon United Kingdom market (103K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in Feb. Verdict: Skip it — 38/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **basal body temperature thermometer market data**
- **Units sold / yr**
- **10K–13K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **£73K–£91K**
- units × avg price
- **Conversion rate**
- **11.8%**
- **Avg BSR**
- **#7**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **89%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **66 months**
- **Avg seller age**
- **176 days**
## **Competition & brand share**
The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▼falling
**Sellers**
**23**
**Top-5 brand share**
**94%**
Top 20: 100%
**Top-5 click share**
**86%**
Top 20: 100%
**Open market**
**3%**
- Easy@Home58% - iProvèn25% - BabyMad4% - Preview4% - Braun4% - One Step3% - Open — no brand owns it (1 brand, 3%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -21.8% search growth over the last 90 days.
3K2KSpike '25Prime Day '25 seasonSepDecMarJunAugNovMarMay
Peak months: Feb · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/basal-body-temperature-thermometer/trend)
## **Top basal body temperature thermometer search terms**
- **basal body temperature thermometer**38K/yr-9.9%12.9% conv. - **bbt thermometer for ovulation**22K/yr-20.3%12.8% conv. - **basal thermometer for ovulation**14K/yr-37.1%10.5% conv. - **bbt thermometer**10K/yr-13.0%10.1% conv. - **basal thermometer**8K/yr-48.7%9.2% conv. - **ovulation thermometer**5K/yr-22.6%10.4% conv. - **natural cycles thermometer**3K/yr-13.4%8.3% conv. - **bbt**3K/yr-17.8%7.8% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/basal-body-temperature-thermometer/search-terms)
## **Top basal body temperature 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%£13K30%£26K45%£40K60%£53K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 9 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Ovulation Tracker Digital Basal Thermometer: Easy@Home BBT Thermometer for Fertility Tracking - Basal Body Thermometer for Accurate Temperature Monitoring with Premom App Purple DMT-3018**Easy@Home**£7.33**4.2★3,390 rev](https://www.amazon.co.uk/dp/B09FXLBRT8) [2**Digital Basal Thermometer 1/100th Degree High Precision Quick 60-Sec Reading Memory Recall Accurate BBT Thermometer for Natural Ovulation Temperature Tracking by iProven**iProvèn**£7.41**4.2★6,023 rev](https://www.amazon.co.uk/dp/B06XTVZ8WY) [3**Ovulation Tracker Digital Basal Thermometer: Easy@Home BBT Thermometer for Fertility Tracking - Basal Body Thermometer for Accurate Temperature Monitoring with Premom App Pink DMT-3018**Easy@Home**£7.29**4.2★3,390 rev](https://www.amazon.co.uk/dp/B09Z25VL9H) [4**Digital Basal Thermometer Ovulation with Backlight LCD Display Premom APP(NOT Bluetooth) 1/100th Degree High Precision Memory Recall Ovulation Tracking Charting & Natural Family Planning Purple**Easy@Home**£12.70**4.2★8,886 rev](https://www.amazon.co.uk/dp/B0842Q3W7T) [5**Basal Thermometer for Ovulation - Switchable C/F - Temperature Chart - Hard Storage Case - BabyMad**BabyMad**£4.37**4.2★641 rev](https://www.amazon.co.uk/dp/B07TXW7WJP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**One Step Basal Body Temperature Thermometer with Bluetooth Digital Ovulation & BBT Tracker with Automatic App Sync for Fertility & Cycle Monitoring**One Step**£6.82**34 rev4mo ago](https://www.amazon.co.uk/dp/B0GQV29F1Q) [**Preview Digital Basal Thermometer for Ovulation Tracking Basal Body Temperature Thermometer BBT for Fertility Prediction High Accuracy IP22 Waterproof**Preview**£4.67**51 rev1y ago](https://www.amazon.co.uk/dp/B0DQD682GW) [**Ovulation Tracker Digital Basal Thermometer: Easy@Home BBT Thermometer for Fertility Tracking - Basal Body Thermometer for Accurate Temperature Monitoring with Premom App Pink DMT-3018**Easy@Home**£7.29**3,390 rev4y ago](https://www.amazon.co.uk/dp/B09Z25VL9H) [**Ovulation Tracker Digital Basal Thermometer: Easy@Home BBT Thermometer for Fertility Tracking - Basal Body Thermometer for Accurate Temperature Monitoring with Premom App Purple DMT-3018**Easy@Home**£7.33**3,390 rev4y ago](https://www.amazon.co.uk/dp/B09FXLBRT8) [**Digital Basal Thermometer Ovulation with Backlight LCD Display Premom APP(NOT Bluetooth) 1/100th Degree High Precision Memory Recall Ovulation Tracking Charting & Natural Family Planning Purple**Easy@Home**£12.70**8,886 rev6y ago](https://www.amazon.co.uk/dp/B0842Q3W7T)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**One Step Basal Body Temperature Thermometer with Bluetooth Digital Ovulation & BBT Tracker with Automatic App Sync for Fertility & Cycle Monitoring**One Step**£6.82**4.2★**▲ 251%**](https://www.amazon.co.uk/dp/B0GQV29F1Q) [**Basal Thermometer for Ovulation - Switchable C/F - Temperature Chart - Hard Storage Case - BabyMad**BabyMad**£4.37**4.2★**▲ 186%**](https://www.amazon.co.uk/dp/B07TXW7WJP) [**Preview Digital Basal Thermometer for Ovulation Tracking Basal Body Temperature Thermometer BBT for Fertility Prediction High Accuracy IP22 Waterproof**Preview**£4.67**4.0★**▲ 51%**](https://www.amazon.co.uk/dp/B0DQD682GW) [**Digital Basal Thermometer 1/100th Degree High Precision Quick 60-Sec Reading Memory Recall Accurate BBT Thermometer for Natural Ovulation Temperature Tracking by iProven**iProvèn**£7.41**4.2★**▲ 20%**](https://www.amazon.co.uk/dp/B06XTVZ8WY) [**Ovulation Tracker Digital Basal Thermometer: Easy@Home BBT Thermometer for Fertility Tracking - Basal Body Thermometer for Accurate Temperature Monitoring with Premom App Purple DMT-3018**Easy@Home**£7.33**4.2★**▲ 14%**](https://www.amazon.co.uk/dp/B09FXLBRT8)
**~~View all trending →~~**
## **What buyers say about basal body temperature thermometer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**24%
*“easy to read”*
**Quality-Overall**8%
*“It is good quality and accurate”*
**Temperature Control**8%
*“Great thermometer”*
**Accuracy-Overall**7%
*“Good accuracy”*
**Advertised Vs Actual Product**6%
*“Item does exactly what it says”*
**Connectivity-Overall**6%
*“The Bluetooth sync is really useful”*
**Efficiency**5%
*“it does the job well”*
**Value For Money**5%
*“Affordable”*
**Battery Life**4%
*“The battery life seems good”*
**Display-Overall**4%
*“the digital display is clear enough to read at a glance”*
### **What buyers complain about **
**Measurement/Reading Accuracy**17%
*“Can't measure temperature accurately might have been an issue with my specific thermometer”*
**Temperature Control**14%
*“Shows a different temperature every time”*
**Functionality-Overall**10%
*“The age precision colour coded technology did not work so it was returned for a replacement as it was a faulty item”*
**Battery Life**9%
*“low battery life”*
**Accuracy-Overall**8%
*“Unreliable and costky”*
**Durability**7%
*“Broke in 2 years”*
**Quality-Overall**5%
*“Quality is not great - sounds like the battery is dying after just a couple of uses”*
**Value For Money**5%
*“App costs £43per year”*
**Advertised Vs Actual Product**4%
*“misleading app advertisement”*
**Ease Of Use**3%
*“Extra features make it less clear how to use”*
### **Top return reasons **
**Functionality-Overall**29%
**Measurement/Reading Accuracy**15%
**Temperature Control**6%
**Accuracy-Overall**6%
**Defective Material/Parts**5%
**Battery Life**5%
**Heating**4%
**Value For Money**4%
**Product Condition**3%
**Display-Overall**3%
## **Common questions**
- **Is basal body temperature thermometer profitable to sell on Amazon United Kingdom?**
- The niche generates £88K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -21.8%. Flapen's verdict: Skip it (38/100).
- **How competitive is the basal body temperature thermometer niche?**
- 7 brands and 23 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 94% of demand.
- **What do buyers complain about in basal body temperature thermometer?**
- Top complaints mined from reviews: Measurement/Reading Accuracy, Temperature Control, Functionality-Overall. The return rate is 0.8%.
- **When does demand for basal body temperature thermometer peak?**
- Demand peaks in Feb; the busiest month runs 1.6× the quietest.
- **What does it cost to enter the basal body temperature thermometer niche?**
- Listings span £4.37–£12.70; the average listing price is £7.27 (sweet spot $15–$100). The average incumbent carries 3,877 reviews — the moat a new listing must climb.
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