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The easy way to track your fertility

best ovulation tracker

Built around real sleep

Wear Tempdrop overnight and let it collect the data in the background. There is no need to take a reading at the same time each morning or build your routine around your thermometer.

ovulation app

Learns your temperature pattern

Tempdrop’s algorithm processes your overnight readings to build a temperature pattern around you, filtering out everyday disruptions so the chart is more useful than a single morning reading.

couple with woman wearing tempdrop looking at tempdrop app on smart phone

All-in-one fertility tracking app

Sync your data to the companion app for easy charting, cycle tracking, and clear fertility insights, all-in-one place on your smartphone.

BBT TRACKING OPTIONS

Find the right tracker for your life

Not all temperature trackers work the same way. Here's why placement, and purpose, make all the difference.

Find the right tracker for your life
A white wearable device next to a smartphone displaying My Cycle app showing Fertile window Ovulation Verified.
Option 1

Tempdrop

Recommended
A digital thermometer displaying a reading of 37.7 degrees Celsius on its screen.
Option 2

Basic Basal Thermometer

A metallic ring featuring a smooth outer surface and an inner panel with three buttons and two circular markers.
Option 3

Finger & Wrist Wearables

Temperature & placement

True core BBT - inner upper arm

Oral - skewed by movement / timing

Surface skin - affected by ambient temperature

Accuracy

Highest - algorithm filtering

Only with a perfect routine

Variable, environment-dependent

Daily Effort

Wear overnight, sync daily

Same wake time, every day

Passive, but not fertility-tuned.

Built for irregular cycles, PCOS & shift work

Yes

No

No

Cost

£229ㅤ£249

~£20

£200–£500 +subscription

Best for

Accurate, stress-free tracking - irregular cycles, PCOS, busy lifestyles

Strict routines & tight budgets

General wellness, not fertility tracking

youtube Load video:

How Tempdrop Works

Understand your fertility and cycle with the Tempdrop wearable monitor.

  1. Wear it to bed - Pop on the armband and press the button on the sensor to turn it on
  2. Tracks while you sleep - Smart algorithm filters out disturbances to give you an accurate reading
  3. Sync in the morning - Quick Bluetooth sync to the app
  4. Understand your cycle - Your chart updates automatically, with personalised insights
ovulation tracker app
The Tempdrop App

Track your cycle with ease with the Tempdrop app.

Tempdrop’s app turns your nightly temperature data into simple, useful cycle insights.

A teardrop shape surrounded by three clockwise arrows forming a circular pattern.

Cycle Tracking

See your full cycle at a glance.

A maroon outline diagram showing two ovaries connected by fallopian tubes to a uterus.

Personalised Fertility Insights*

Tailored to your unique body.

A maroon outline drawing of a circular shape with two smaller circles inside.

Ovulation Confirmation

Know when you’ve ovulated.

A crescent moon shape with three Zs inside representing sleep.

Sleep Quality Analysis*

Get insights on your quality of sleep.

A maroon heart shape containing a simplified heartbeat line graph.

Multiple Symptom Tracking

Track more than just temperature.

A magnifying glass highlighting bar chart data.

Accurate Fertility Predictions

98.6% accuracy in clinical trials.

*Premium app features.

The core app is completely free and gives you everything you need to track and understand your cycle. However, if you want to go deeper, the premium app unlocks additional features for just £4/month - entirely optional.

The Tempdrop App

Track your cycle with ease with the Tempdrop app.

Tempdrop’s app turns your nightly temperature data into simple, useful cycle insights.

ovulation tracker app
A teardrop shape surrounded by three clockwise arrows forming a circular pattern.

Cycle Tracking

See your full cycle at a glance.

A maroon outline diagram showing two ovaries connected by fallopian tubes to a uterus.

Personalised Fertility Insights*

Tailored to your unique body.

A maroon outline drawing of a circular shape with two smaller circles inside.

Ovulation Confirmation

Know when you’ve ovulated.

A crescent moon shape with three Zs inside representing sleep.

Sleep Quality Analysis*

Get insights on your quality of sleep.

A maroon heart shape containing a simplified heartbeat line graph.

Multiple Symptom Tracking

Track more than just temperature.

A magnifying glass highlighting bar chart data.

Accurate Fertility Predictions

98.6% accuracy in clinical trials.

*Premium app features.

The core app is completely free and gives you everything you need to track and understand your cycle. However, if you want to go deeper, the premium app unlocks additional features for just £4/month - entirely optional.

Results You Can Trust

basal body temperature app

94%

of users recorded a temperature shift across 80% of cycle days.

ovulation app tracker

2.1

average cycles to conception for users tracking at least 60% of each cycle.

best ovulation tracker app

55k+

pregnancies reported by Tempdrop users tracking their cycles with the device.

Support For Every Cycle

Tempdrop helps you understand your cycle more clearly, whether you're trying to conceive, managing irregular cycles, or navigating hormonal changes.

lady sleeping with a wearable ovulation tracker on her arm

Pinpoint your fertile window with more confidence.

Trying To Conceive

Tempdrop tracks your overnight temperature patterns to help confirm ovulation and make your fertile window easier to interpret. Over time, your chart builds a clearer picture of your cycle, giving you more useful context when timing sex for pregnancy.

Over 55k pregnancies.
Clinically validated.
Wear it. Sleep. Sync.
​

Trusted by Doctors & Experts

A woman smiling against a white shuttered background wearing a polka dot top.

Kate

The Cheshire Acupuncturist

"Sometimes, the answers aren’t in the 'average' cycle data. They’re in the details you uncover when you track consistently, and with the right tools."

A woman wearing a pink blouse and skirt stands smiling against a wooden fence.

Dr. Meagan Breining

Naturopathic Doctor

“I want to be able to share Tempdrop with anyone who is willing to listen! I believe fertility awareness is highly under-utilized & I love how Tempdrop's team wants to increase education about FAM's.”

A woman with long hair smiles while wearing a navy blue top and a black choker against a plain wall.

Megan Maitland

Women’s Health Expert

“Tempdrop cuts through all the inaccuracies that can go along with basal body temperature tracking, and I love that it can be used by women who don’t have regular sleep schedules or have irregular periods.”

A woman wearing glasses and a white lab coat smiles at the camera.

Dr. Alicia Thompson

Obstetrician gynecologist

“I'm passionate about Tempdrop and eager to see how far it can go to help women learn about their bodies.”

A woman smiling outdoors against a green leafy background.

Tarina Mosley

Certified Fertility Awareness Educator

“I love this product. I purchased one of the original Tempdrops and have been obsessed ever since. I highly recommend Tempdrop to my clients.”

A woman smiling while wearing round-framed glasses and a white top against a light green background.

Dr. Mona Wiggins

Doctor of Nursing Practice, FAM Educator & Cycle Coach

“When I came across an easier answer to monitoring BBT I was mesmerized.”

FAQs

Customer Reviews

Overall rating: 4.7 / 5 from 37 reviews.

I’m happy with the Tempdrop. I wouldn’t be happy that you don’t have the option to insure it when you live in the UK. Femme don’t offer insurance. The US Tempdrop main site won’t sell to UK customers, so they won’t insure their product sold by third party companies. It means that there is no way to insure it if you live in the UK. For an important item like this, and the cost involved, it’s a real miss to not be able to have the security of it being insured.

Tempdrop Fertility, Cycle & Ovulation Tracker | Wearable Basal Body Temperature Tracker

I've been wearing it for a couple of days now and I'm really happy. The extra band piece helped me secure the device and keep it in place, making it easy to use every night and morning for the temp sync. This feels way more accurate for recording BBT and it takes some stress away. I really recommend it!

Tempdrop Fertility, Cycle & Ovulation Tracker | Wearable Basal Body Temperature Monitor

Store owner replied: Hi Loredana, Thank you for sharing your experience! We're so pleased to hear that you're enjoying your Tempdrop so far. It's wonderful to know the extra band piece has helped you get a secure fit and that tracking your BBT feels simpler and less stressful. Thank you for recommending Tempdrop - we really appreciate your support.

Really liking my Temp Drop - been using it for a couple of weeks and already I feel I understand by body and cycles better. I’m feeling positive about this supporting me through perimenopause so I can be more in control of what my body needs.

Tempdrop Fertility, Cycle & Ovulation Tracker | Wearable Basal Body Temperature Monitor

Store owner replied: Hi Claire, Thank you for your lovely review, We're so pleased to hear that Tempdrop is helping you feel more connected to and informed about your body and cycles. Knowing that it's giving you greater confidence and helping you feel more in control during perimenopause is exactly what we love to hear.

Had the tempdrop for about 2 weeks now and I love it. It's far more accurate than an oral bbt thermometer. It did take a few days to get used to wearing the band on my arm but after a few days all good. So easy to sync to the app and I would recommend the premium version of the app.

Tempdrop Ovulation & Fertility Cycle All-In-One Tracker | Monitors Basal Body Temperature During Sleep

Store owner replied: Hi Alexandra, Thank you for sharing your experience! We're so pleased to hear you're loving your Tempdrop and finding it more accurate and convenient than oral BBT tracking. It's great to know you've settled into wearing the band and are enjoying how easy it is to sync with the app. Thank you for your recommendation, and we're delighted to be supporting you on your tracking journey.

Customer photo review of Tempdrop - BBT tracking while you sleep

So much easier than thermometer measuring, which was stressing me out and I would easily forget to do first thing. Straight forward and simple. Thanks!

Tempdrop - BBT tracking while you sleep

Only had my Tempdrop for a month, so far the app and tracking is easy to use. However, I feel that the band is badly designed. The fabric is stretchy, but the edges of the band are not, so they dig into your skin. My arm is quite small, and the only way I can adjust to the right size is using the hook and eyes - this is not very effective. Either the band is too loose and moves around in the night (so my temperature is inaccurate) or the band is too tight and is very uncomfortable). I’m going to buy a soft jersey band from Etsy in the hope that this problem is solved

Tempdrop - BBT tracking while you sleep

Store owner replied: Hi Rosie, thank you so much for taking the time to leave this helpful review. We're glad that you're finding Tempdrop easy to use. We're sorry to hear about the armband sizing, we'll be feeding this back to Tempdrop on your behalf.

Love the actual temp drop for tracking, however, as many others have mentioned, the app itself is pretty awful from a usability standpoint. It looks nice aesthetically, but it’s not very compact, intuitive, or quick to navigate. There are too many little icons/images, and it’s hard to keep track of what each one represents at a glance. I really wish it functioned more like Fertility Friend — simple, data-focused, and easy to read. If it did, I’d absolutely pay for it. As of now, I just end up transferring all my data over to Fertility Friend anyway, and that only cost me $20 for the entire year.

Tempdrop - BBT tracking while you sleep

Better return policies, I am unconvinced by the product and wish I wasn’t stuck with it

Tempdrop - BBT tracking while you sleep

Store owner replied: Thank you for leaving your feedback - we're sorry to hear you're feeling uncertain about Tempdrop. We completely understand how frustrating it can be to feel stuck, and we wish we could offer a more flexible solution. Unfortunately, as Tempdrop is classified as a medical device, we're required to follow Tempdrop's own no-return policy, which applies across all retailers - this isn't something we're able to override on our end. That said, we really don't want you to be left with a device you're not getting the most from! Our team would love to help address any concerns or questions you have - please don't hesitate to reach out to us at talktous@femmehealth.co.uk. If you're experiencing any technical difficulties with the device itself, the Tempdrop support team can also be reached directly through the Help function in the Tempdrop app, where they can walk you through troubleshooting step by step. We hope we can turn your experience around - please do get in touch.

Works great! Really handy to use, especially with a toddler running around.

Tempdrop - BBT tracking while you sleep

Store owner replied: Thank you so much for taking the time to leave this review! We're so glad Tempdrop is working great for you and is making temperature tracking easier.

Happy over all

Tempdrop - BBT tracking while you sleep

Store owner replied: Thank you so much for taking the time to leave this review. We're glad you're happy with your Tempdrop!

I'm finding it fine to wear. No issue there. The only problem is that twice when I've tried to sync it, it has flashed red and then I've lost the data. The button under the fabric is a little awkward to press. I'm not sure if I'd recommend it yet, will give it some more time.

Tempdrop - BBT tracking while you sleep

Store owner replied: Hi Paula, thank you so much for taking the time to leave this review. We recommend you use the 'Help' function on the Tempdrop app to contact Tempdrop support. Tempdrop can troubleshoot what may be going on with your device and provide advice and the next steps. Any issues, please do come back to us and we'll be happy to help. Thanks, Becs

So far so good, seems to track efficiently. Only negative is the app always has a pop up when you open it, pushing you to upgrade to paid version. I really think this is poor as the item price is quite expensive - I shouldn’t have to click a pop up every time I open the app.

Tempdrop - BBT tracking while you sleep

Store owner replied: Hi Charlotte, thank you so much for taking the time to write this review. We're glad to hear that Tempdrop is tracking well for you. We will pass your feedback onto Tempdrop about the pop up. Thank you again, Becs

Really enjoying my temp drop so far, easy to use app and manual to set it up. I had an issue with my order as I didn’t specify an eircode even though my order was dispatched very quickly, I contacted Charlotte in femme health and she got back to me extremely quickly and took care of everything and I had my order the next day. Really good service, thank you guys x

Tempdrop - BBT tracking while you sleep

Store owner replied: Thank you so much for your kind words! We’re delighted to hear you’re enjoying Tempdrop and found the app and setup process easy. We’re especially glad Charlotte could step in quickly and get everything sorted for you. We know how important it is to receive your order without hassle, so it’s great to hear it all worked out smoothly in the end. Your feedback truly means a lot to us thanks again for your support!

I've used Tempdrop for several years now and find it a great, easy to use tool for assisting with tracking your menstrual cycle. Femme have great customer service, they were quick to respond to me and answer my questions about the product 😊

Tempdrop - BBT tracking while you sleep

Really loving fem drop, I have since paid a bit more and bought the sleep stats too which I’m loving seeing! Easy to use and keep track of my cycle. I’ve used other apps before and really do think this one is the best and most accurate. Thanks!

Tempdrop - BBT tracking while you sleep

Really enjoying using TempDrop, finding it so interesting tracking the changes through my cycle, has given me the freedom to sleep naturally and not be forced to wake up at the same time everyday. It has made me realise how cool my body is!!

Tempdrop Fertility Monitor | Version 2

Works well for me straight away. It’s pricey, but nice not to have to try to wake up at the same time of day - so especially good for people with less regular sleep patterns/disturbed sleep

Tempdrop - BBT tracking while you sleep

I hesitated a while before buying but it does not disappoint. Love it as a tandem breastfeeding mother who doesnt get much consistent sleep!

Tempdrop - BBT tracking while you sleep

I'm so glad I made the jump to Tempdrop. So much easier to handle than a regular BBT thermometer! Side note - the armband was very tight at first (and too loose with the extender), but it loosened very quickly.

Tempdrop - BBT tracking while you sleep

I love this tracker. Previously I used a standard thermometer and was tracking the body temps by myself so when I discovered Tempdrop I was super relieved, no more waking up at the same time and trying to be consistent with bedtime. Especially i wake up a lot at nighttime (mom of 2 and breastfeeding). Also the customer service is extremely helpful!! Highly recommend!

Tempdrop - BBT tracking while you sleep

I have been using this for a few weeks now and it’s great - you’d never know you’re wearing it while you’re asleep and so easy to use. Armband fits upper arm fine, easy to secure, comfortable. I’m not the best sleeper so good to know that doesn’t affect the way it works - really recommend if you don’t want to wear another piece of tech during the day and prefer a more discreet version while you’re asleep. Has already been helping me spot patterns with my period health.

Tempdrop - BBT tracking while you sleep

After trying and failing with so many other cycle tracking products, I'm so happy to have found this amazing armband - I struggle to commit to taking my temperature at the same time every day, so knowing I have a much wider window to sync to my phone is great. So comfy while sleeping and found the other data it collects really interesting too - app was also easy to download. Would recommend, well worth the price for accurate tracking!

Tempdrop - BBT tracking while you sleep

Product arrived promptly and in perfrct condition. It is easy to use and instructions are clear. Very happy with product.

Tempdrop Fertility Monitor | Version 2

This is so convenient to use, you just pop it on your arm at night-time and forget about it until morning! Sync it with the app and keeps records of your daily temp, no stress whatsoever! It was delivered in a lovely box with a small thank you gift for purchasing which made it that little bit more special

Tempdrop Fertility Monitor | Version 2

It it so easy to use as I would forget to take my temperature orally some morning s and it it so much more acute with the readings and I love how it tracks my sleep

Tempdrop Fertility Monitor | Version 2

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Final purchase confirmation

IVFN Membership is not Tempdrop Premium

Your cart contains a 12-month IVFN Membership. IVFN is a separate membership and does not unlock Tempdrop Premium app features.

Your IVFN membership includes:

  • Access fertility and reproductive health experts through live online sessions and Q&As.
  • Use educational fertility content, practical resources and expert-led information.
  • Join supportive community discussions, virtual meetups and safe space sessions.
  • Unlock member-only wellbeing offers and selected consultation benefits.

If you intended to buy only your Tempdrop, or you were looking for the separate Tempdrop Premium app subscription, remove IVFN before checkout.