- Tempdrop sensor - Fabric Armband + Extender - Long lasting coin cell battery - Battery changing tool - User manual Important information Unless otherwise stated, all prices are displayed in USD. For customers in the US, EU and Israel, displayed prices include applicable taxes, and no customs fees will be charged upon delivery. For all other countries, buyers are responsible for any import duties or taxes that may be charged upon delivery.

Delivery within the US and the EU typically takes 4-7 business days and up to 2-4 weeks elsewhere, depending on location.

30-Day Change of Mind Unopened and unused items can be returned within 30 days for a refund, minus a $20 refund processing fee. 12-Month Satisfaction Guarantee Add VIP Care Package upgrade at purchase for a one-year satisfaction refund guarantee of the product price. Upgrade package cost is non-refundable. Shipping costs are the buyer’s responsibility, contact support to initiate a refund.

The No-Alarm Method

BBT tracking that doesn't care when you wake up.

Tempdrop measures your temperature while you sleep.

No alarm. No schedule. No invalid readings.

FDA Registered

HSA/FSA Eligible

30-Day Returns

The No-Alarm Method

BBT tracking that doesn't care when you wake up.

Tempdrop measures your temperature while you sleep.

No alarm. No schedule. No invalid readings.

FDA Registered

HSA/FSA Eligible

30-Day Returns

SOUND FAMILIAR?

Here's why traditional BBT fails most women.

It's not that you're doing it wrong. It's that the method was designed for a life most of us don't have.

The Parent

The baby woke up at 4am. You settled her, went back to sleep. Now it's 7am and your BBT reading is useless. You've lost another day of data.

The Shift Worker

Your schedule rotates. Some weeks you're up at 5am, some weeks it's noon. Every thermometer on the market assumes you wake up at the same time every day.

The Traveler

Time zones, jet lag, early flights. You've been tracking for three months and you still don't trust the data because too many readings were "off."

Your schedule isn't the problem.

The tool was.

SOUND FAMILIAR?

Here's why traditional BBT fails most women.

It's not that you're doing it wrong. It's that the method was designed for a life most of us don't have.

The Parent

The baby woke up at 4am. You settled her, went back to sleep. Now it's 7am and your BBT reading is useless. You've lost another day of data.

The Shift Worker

Your schedule rotates. Some weeks you're up at 5am, some weeks it's noon. Every thermometer on the market assumes you wake up at the same time every day.

The Traveler

Time zones, jet lag, early flights. You've been tracking for three months and you still don't trust the data because too many readings were "off."

Your schedule isn't the problem.

The tool was.

SIMPLE BY DESIGN

Three steps. That's it.

Wear it before sleep

Slide the armband onto your upper arm and turn it on. That's the whole setup. No calibration, no wake time to log, no pre-sleep ritual.

Sleep normally

Any time. Wake up once, twice, sleep in - Tempdrop's algorithm filters out disturbances automatically.

Sync when it suits you

Open the app, sync your data, see your temperature. Add symptoms if you want. Your reading is already valid — whenever you wake up.

SIMPLE BY DESIGN

Three steps. That's it.

Wear it before sleep

Slide the armband onto your upper arm and turn it on. That's the whole setup. No calibration, no wake time to log, no pre-sleep ritual.

Sleep normally

Any time. Wake up once, twice, sleep in - Tempdrop's algorithm filters out disturbances automatically.

Sync when it suits you

Open the app, sync your data, see your temperature. Add symptoms if you want. Your reading is already valid — whenever you wake up.

CLINICALLY VALIDATED

Accurate data you can actually trust.

We don't just say "accurate." A peer-reviewed clinical study across 194 full menstrual cycles put a number on it — and compared it to what you're using now.

98.6%

Ovulation detection accuracy

Peer-reviewed clinical study · 194 cycles vs. 93% for wrist-based wearables

FDA Registered

Cleared as a Class II medical device in the United States

HSA / FSA Eligible

Use pre-tax dollars — reduces your real out-of-pocket cost

Peer-Reviewed Study

Published methodology — not just marketing claims

OB-GYN Endorsed

"A game changer — I'm passionate about this device." — Dr. Alicia Thompson, Board-Certified OB-GYN

Tens of Thousands of Users

Trusted by women, fertility educators, and FAM practitioners worldwide

CLINICALLY VALIDATED

Accurate data you can actually trust.

We don't just say "accurate." A peer-reviewed clinical study across 194 full menstrual cycles put a number on it — and compared it to what you're using now.

98.6%

Ovulation detection accuracy

Peer-reviewed clinical study · 194 cycles vs. 93% for wrist-based wearables

FDA Registered

Cleared as a Class II medical device in the United States

HSA / FSA Eligible

Use pre-tax dollars — reduces your real out-of-pocket cost

Peer-Reviewed Study

Published methodology — not just marketing claims

OB-GYN Endorsed

"A game changer — I'm passionate about this device." — Dr. Alicia Thompson, Board-Certified OB-GYN

Tens of Thousands of Users

Trusted by women, fertility educators, and FAM practitioners worldwide

REAL WOMEN, REAL WORDS

They called it a "game changer."

We didn't write this language. We found it — in reviews, Reddit threads, and Facebook groups — before we wrote a single ad.

"Tempdrop was a "game changer" for me. I'm passionate about this device and am eager to see how far it can go to help women learn their bodies."

Verified review — Dr. Alicia Thompson, Board-Certified OB-GYN

Dr. Alicia Thompson

Board-Certified OB-GYN

"I work nights. I've tried every BBT thermometer out there. Nothing worked until this. I finally have two full cycles of clean data."

Sarah M. Shift nurse, Texas

"My baby wakes me up twice a night. I had completely given up on BBT. Tempdrop gave me three months of usable data during the hardest sleep of my life."

Jamie L. Mom of a 9-month-old, Oregon

"I travel for work every week. I've been in 4 time zones this month. My charts are still clean. I don't know how it works, but it does."

Rachel K. Consultant, New York

REAL WOMEN, REAL WORDS

They called it a "game changer." Seven times. Independently.

We didn't write this language. We found it — in reviews, Reddit threads, and Facebook groups — before we wrote a single ad.

"Tempdrop was a "game changer" for me. I'm passionate about this device and am eager to see how far it can go to help women learn their bodies."

Verified review — Dr. Alicia Thompson, Board-Certified OB-GYN

Dr. Alicia Thompson

Board-Certified OB-GYN

"I work nights. I've tried every BBT thermometer out there. Nothing worked until this. I finally have two full cycles of clean data."

Sarah M. Shift nurse, Texas

"My baby wakes me up twice a night. I had completely given up on BBT. Tempdrop gave me three months of usable data during the hardest sleep of my life."

Jamie L. Mom of a 9-month-old, Oregon

"I travel for work every week. I've been in 4 time zones this month. My charts are still clean. I don't know how it works, but it does."

Rachel K. Consultant, New York

REAL QUESTIONS, REAL ANSWERS

The things you're actually wondering.

In your words — not softened brand language.

REAL QUESTIONS, REAL ANSWERS

The things you're actually wondering.

In your words — not softened brand language.

READY TO START?

Wear it tonight. See your data tomorrow.

No alarm required. No routine to maintain.

Just your temperature — captured while you sleep.

HSA/FSA Eligible

30-Day Returns

Free Shipping

FDA Registered

READY TO START?

Wear it tonight.

See your data tomorrow.

No alarm required. No routine to maintain.

Just your temperature — captured while you sleep.

HSA/FSA Eligible

30-Day Returns

Free Shipping

FDA Registered

Not intended to prevent pregnancy. Consult your healthcare provider for fertility and reproductive health decisions.

BBT tracking that doesn't care when you wake up.

BBT tracking that doesn't care when you wake up.

Here's why traditional BBT fails most women.

The Parent

The Shift Worker

The Traveler

Here's why traditional BBT fails most women.

The Parent

The Shift Worker

The Traveler

Three steps. That's it.

Wear it before sleep

Sleep normally

Sync when it suits you

Three steps. That's it.

Wear it before sleep

Sleep normally

Sync when it suits you

Accurate data you can actually trust.

98.6%

Accurate data you can actually trust.

98.6%

They called it a "game changer."

They called it a "game changer." Seven times. Independently.

The things you're actually wondering.

"Is armband temperature as accurate as oral BBT? I've heard they give different readings."

"Do I need to wake up at the same time every day?"

"What if I sleep in different positions or move a lot?"

"~$200 is a lot when I don't know if this will finally be the thing that works."

"Is it safe to wear every night?"

"Do I still need to learn FAM? I thought this would tell me when I'm fertile."

The things you're actually wondering.

"Is armband temperature as accurate as oral BBT? I've heard they give different readings."

"Do I need to wake up at the same time every day?"

"What if I sleep in different positions or move a lot?"

"~$200 is a lot when I don't know if this will finally be the thing that works."

"Is it safe to wear every night?"

"Do I still need to learn FAM? I thought this would tell me when I'm fertile."

Wear it tonight. See your data tomorrow.

Wear it tonight.

See your data tomorrow.