Personalized insights for conceiving, tracking hormones, and practicing fertility awareness.
Understand your hormonal health and manage cycle symptoms with greater clarity.
Understand your hormonal health and manage cycle symptoms with greater clarity.
Key benefits
Increase your chances of conceiving by knowing your most fertile days.
Identify your most fertile days with 98.6% accuracy.
Key benefits
Navigate your body's return to fertility with ease, even on zero sleep.
Navigate your body's return to fertility with ease, even on zero sleep.
Key benefits
Get accurate data that adapts to your unique cycle length and rhythm.
Get accurate data that adapts to your unique cycle length and rhythm.
Key benefits
Core Features
Soft Fabric Armband
Made with soft, breathable materials and a low-profile sensor, the band is built to stay secure without being restrictive. Designed with adjustable sizing. Most users find they forget they’re even wearing it after just a few nights, allowing you to rest naturally while the sensor works in the background.
Smart adaptive algorithm
Our algorithm automatically adjusts for sleep interruptions or night wakings, late nights, or rotating schedules. It ignores the "disturbances" of life to ensure your daily temperature reading is stable and accurate.
User-Replaceable Battery
A simple coin cell battery lasts about a year and can be replaced at home in seconds.
The Integrated App
Data syncs from sensor to screen in seconds, providing a daily physiological status update. View high-precision temperature trends for an accurate understanding of exactly where you are in your cycle.
How It Works
Before you go to sleep, press the drop-shaped button to turn on your Tempdrop sensor. Place the band on your upper arm and leave it on throughout the night.
Remove once you are up for the day and sync with the Tempdrop app whenever convenient.
Track your symptoms to verify ovulation and learn about your cycle phases.
View the chart and interpret your results. Upgrade to premium for automatic interpretation.
Mobile App
Your cycle,
in your pocket.
Tempdrop brings the full fertility tracking solution to your smartphone.
Unlock deeper insights with advanced cycle analysis, sleep quality data, and expert fertility education.
All Free features +
Get the app
Available on iOS and Android
Data Science
Basal Body Temperature (BBT) is your body's lowest temperature at rest. It is typically reached during deep sleep when your metabolism is at its baseline and heat production is minimal.
Because your menstrual cycle is driven by hormonal shifts, your BBT naturally changes throughout each phase:
Before Ovulation: Your temperature is lower, influenced by the presence of estrogen.
After Ovulation: The hormone progesterone becomes dominant, causing a slight 'but consistent' increase in your body temperature.
By measuring these subtle shifts daily, Tempdrop provides the physiological proof needed to confirm ovulation and gain deeper insights into your overall reproductive health.
Reliable pattern output
20,000+ readings/night
Sleep-aware correction
Trusted by fertility experts
I'm passionate about Tempdrop and eager to see how far it can go to help women learn about their bodies.
When I came across an easier answer to monitoring BBT I was mesmerized.
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.
I love this product. I purchased one of the original Tempdrops and have been obsessed ever since. I highly recommend Tempdrop to my clients.
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.
FEATURED IN
Community
4.8
1,017+ reviews
I have endometriosis, PMDD and ADHD and Tempdrop has completely changed my life. No more having to remember to temp when I'm half asleep in the morning, it takes out all the guesswork. I use Tempdrop, along with my fertility awareness method, to confirm ovulation. I love how I can see when I ovulate, when my PMDD shift is coming and even when an endo flare is likely. I feel prepared, informed and in so much more control than I before
After a year of TTC, I was finally able to conceive naturally on my first confirmed ovulation cycle using Tempdrop. Tempdrop was simple, practical, and fit seamlessly into my routine. Paired with ovulation strip testing, Tempdrop made the process feel much more manageable and gave me so much more confidence in understanding my cycle and understanding my body. After months of negative tests and uncertainty, finally seeing that positive was such an emotional moment.
I've been taking my temperature every morning for over a decade. But then I had a baby. Co-sleeping, nursing, and waking up at all hours... suddenly those slow, consistent mornings just weren't accessible anymore. That's when Tempdrop became my new best friend. The set-it-and-forget-it tracking has been a game changer. I can confirm ovulation, count my luteal phase, avoid surprise periods, even with my morning routine out the window. For anyone in a postpartum (or just busy) season of life... this makes tracking temp actually doable.
My husband and I were losing hope after going through 2 rounds of IVF and 2 failed embryo transfers. We were told our chances were close to zero at my age, so we cancelled the next round and decided to continue with natural conception. I wanted to monitor my BBT, but I didn't like checking it with a thermometer, so I liked that Tempdrop is worn on the outside of the body. I was able to confirm ovulation when my BBT started to rise and stayed above the cover line, and 2 weeks later we saw those 2 little lines. Today he's 5.5 months, and he's a lovely baby boy 💙 We are so lucky and happy!
Tempdrop has truly made BBT tracking so convenient and has given me peace of mind, especially when it came to me starting my journey to learn a fertility awareness method to prevent pregnancy naturally. I knew I never wanted to go on hormonal birth control, but I didn't know what other options I had. After hearing about fertility awareness methods and Tempdrop, I was all in. It is truly wonderful and fulfilling to know what is going on in your body on a day-to-day basis.
After struggling with irregular periods and the daily stress of traditional BBT thermometers making me feel like I was chained to my nightstand each morning, and ovulation strips giving me false positives, I knew I needed a better way to track ovulation. So when we were ready to try for our next baby, I knew I needed something easier and more informational. Tempdrop was recommended to me and now I love being able to turn off my brain about my cycle but I also really like the option of logging cervical mucus, mood and disturbances to see trends. As a doula, I now recommend Tempdrop to all my clients.
I began using Tempdrop for baby #2, as I wanted to conceive quickly. Paired with ovulation strips, Tempdrop helped me learn I had a short luteal phase affecting implantation. The weekend I got pregnant, my ovulation tests never showed positive, but my Tempdrop showed a temperature spike! Sharing this BBT data with my practitioner meant treatment to aid implantation. I would have assumed I wasn't ovulating without Tempdrop. It was an amazing resource to share with doctors—I recommend it to everyone!
I just wanted to say thank you to the Tempdrop group, the creators of the device and those who gave me feedback and advice on charts. I purchased my device with suspected non-ovulatory cycles, which Tempdrop helped confirm. It took further help to fall pregnant (and a good few years in between), however, having my charts and data handy to give to my doctors made it easy to prove my cycles were “wonky” and to begin the process of fertility treatments. Now I have a beautiful 3-week-old baby girl, and I owe some gratitude to this device for starting me on my journey to her.
I just want to say a big thank you to Tempdrop and the team! I have PCOS and it took me over 2.5 years to conceive my son. I only ovulate a few times a year and prior to Tempdrop I was completely unaware of that and taking pregnancy tests every single month. Thanks to Tempdrop, I knew when I could expect my period and it kept me from taking negative tests every month!
FAQ
Tempdrop is a wearable fertility monitor that measures your basal body temperature (BBT) while you sleep - no alarm, no schedule, no invalid readings. Along with its fertility tracking app, Tempdrop automates the data collection required for accurate cycle tracking, providing the confidence you need to manage your reproductive health without the stress of manual temping.
A traditional Basal Body Temperature (BBT) thermometer requires a strict routine to be accurate: you must take your temperature orally as soon as you wake up, at the same time every morning, after at least 3–4 hours of uninterrupted sleep.
Tempdrop removes these lifestyle barriers. Unlike a manual thermometer, Tempdrop uses continuous overnight tracking and a patented algorithm to identify your true basal body temperature. By monitoring your BBT throughout the night, it filters out disturbances like restless sleep, late nights, or waking up at different times.
With Tempdrop, you get a reliable reading that fits your life, not the other way around.
Most popular wearables are designed for general fitness, tracking metrics like heart rate and daily steps. While some now include temperature sensors, they typically measure skin temperature patterns rather than true Basal Body Temperature (BBT).
Tempdrop is a dedicated fertility tool. We don’t track heart rate or activity because we focus 100% of our technology on capturing your core resting temperature with medical-grade precision. This focus allows Tempdrop to provide the high-resolution BBT readings required for Fertility Awareness Methods (FAM)—accuracy that general-purpose trackers often cannot reach.
Our precision is backed by science: recent clinical research confirms that Tempdrop’s patented technology provides 98.6% accuracy for fertile window detection, making it a reliable partner for your reproductive health goals.
Our precision is backed by science: recent clinical research confirms that Tempdrop’s patented technology provides 98.6% accuracy for fertile days detection and 93.3% accuracy for confirming ovulation.
Tempdrop is unique because it's a wearable that gives you freedom and options to suit your specific needs. The Tempdrop app has both free and premium versions.
Tempdrop Premium is an optional in-app subscription upgrade that transforms your daily temperature readings into actionable fertility insights through automated chart analysis and cycle tracking tools.
The Premium subscription provides advanced automatic cycle interpretations, including:
The Tempdrop battery typically lasts 10 to 14 months with regular nightly use.
Because it is powered by a standard CR2032 coin cell battery, you never have to worry about plugging it in or daily charging.
Easy to Replace: You can quickly swap the battery yourself at home using standard, easily accessible coin cells.
Low Battery Alerts: The Tempdrop app will notify you in advance when power is running low, ensuring you never miss a night of tracking.
Yes, you can use Tempdrop postpartum. Its wearable sensor is designed to filter out disruptions from broken sleep, making it an effective tool for tracking fertility while breastfeeding or experiencing irregular postpartum cycles. Because Tempdrop does not rely on predictions, it adapts to your body in real time. It works best for postpartum moms when it is used along with tracking other body signs, such as cervical mucus or hormonal markers.
Tempdrop is designed for flexibility, so you don’t need a fixed wake-up time.
General guidelines:
Turn it on before sleep and remove it once you’re fully awake.
Yes, Tempdrop is entirely safe for overnight wear, including during pregnancy and postpartum.
Designed specifically for safe sleep tracking, Tempdrop operates with zero active radiation or Bluetooth transmission while you sleep. The sensor is powered by a standard, low-voltage coin cell battery (rather than a rechargeable lithium-ion battery), meaning it generates no heat.
The Bluetooth Low Energy (BLE) function only turns on for about 30 seconds when you actively choose to sync your data. It is manufactured with medical-grade, skin-safe materials and is fully FCC and CE compliant.
12-month satisfaction guarantee
Upgrade by adding 'VIP Care Package' before purchase to add a 12-month satisfaction refund guarantee to your Tempdrop.
30-Day Change of Mind
Unopened Tempdrops may be returned within 30 days. Contact our team to initiate a return.
Yes—Tempdrop was specifically designed to handle the irregular sleep patterns that make traditional tracking impossible.
A traditional BBT thermometer requires you to wake at the same time every day after at least 3–4 hours of consecutive sleep. For shift workers, on-call professionals, or new parents, these requirements are often impossible to meet.
Tempdrop removes these barriers by monitoring your temperature continuously throughout the night (or day). Our patented algorithm filters out disturbances caused by changing sleep times, bathroom trips, or waking up to a pager. As long as you wear the sensor for at least three hours and get a minimum of two hours of sleep (even if not consecutive), Tempdrop will provide a valid, accurate BBT reading.
At Tempdrop, we treat your health data with the highest level of security and respect. We do not sell your personal information to third parties, and all sensitive health data is used exclusively to provide your cycle insights or, with your explicit consent, for de-identified research to advance women's health. We operate under strict data protection principles (including GDPR compliance), ensuring that your identity and your biological data remain private and under your control. You can read our full data privacy policy here.
We understand the concerns regarding reproductive privacy, and we are committed to protecting our users. To give you ultimate control, we have built a permanent account deletion feature directly into the app. If your Tempdrop journey comes to an end and you choose to delete your account, all your personal and health data is scrubbed from our servers, leaving nothing to be retrieved or reported. We believe that your body’s data belongs to you, and we provide the tools to ensure it stays that way.
