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Acquiring Accurate Body Temperature

Accurately deriving body temperature from skin measurements is an engineering feat. Tempdrop is uniquely able to arrive at an accurate body temperature thanks to a combination of advanced sensors and sophisticated algorithms. 

Tempdrop uses two temperature sensors and an acceleration sensor that measures three-axis acceleration (x, y, and z) to acquire information on ambient and body temperature.

Tempdrop combines two algorithms, a learning algorithm and our patent-pending Active Temperature-Noise Cancellation (ATNC™)  filtering algorithm, to both learn personal sleeping temperature patterns and filter out disturbances to  temperature readings like blankets or sleeping positions. 

Connecting The Dots, Learning Your Patterns

The real magic of Tempdrop starts after 14 days of data collection. From this point, our learning algorithm that identifies nightly and monthly patterns will start to filter variables, adjusting your previous results after each new reading. This process gradually gets smarter as it continues to learn your unique patterns.

This smart technology means Tempdrop will be able to filter out variables such as occasional nights of drinking or nights of disturbed sleep, giving you clearer, smoother cycle charts. Because of our unique approach to measuring your true sleep temperature, Tempdrop works wonders for all women but especially for shift workers, breastfeeding moms, and those with irregular cycles due to PCOS and other causes.

*If you are already tracking with a traditional BBT thermometer, it is recommended to continue using your temping method for up to 60 days to validate that Tempdrop’s readings correlate with your BBT chart. During this 60-day early learning phase, you should not rely on your Tempdrop temps if you are avoiding pregnancy. It's normal for Tempdrop temps to be higher or lower than your oral readings.

Your Data, Your Choice

Our greatest responsibility is caring for the personal health data you track with Temp drop. As part of our commitment to keeping your data safe and private, you always have the option to access, download, or permanently delete your data history.
Tempdrop is completely safe to use. The Tempdrop sensor silently logs your sleep data while you wear it and only communicates with our servers when you take it off to sync your data. There is no active wireless communication while you wear Tempdrop.
Lifelong Companion
The data that Tempdrop collects belongs to you and you will always have access to it. As your needs and desires change over time, Tempdrop will be there for you, helping you to trust your body and make conscious decisions. It’s our mission to put a tool in your hands that supports you.

Ease Of Use

We see Tempdrop as a lifelong companion, so we built it to be easy to use and loaded it with options. Instead of locking you into a specific symptothermal method (STM) or fertility charting app, we give you your data to do with as you please. Simply retrieve your daily temp using our official Tempdrop syncing app (Apple Store, Google Play) and enter it into the charting app or method of your choice.

Tempdrop has auto integration with some fertility charting apps and we're working to partner with more, but our data can be manually inputted into any app that isn't on our list. Please see the app integrations list for more information.

Additionally, our sensor doesn’t require charging and comes with a standard watch battery that doesn’t need to be changed for six to nine months. We also offer industry-leading warranty and return options. With Tempdrop Care, you can get coverage against unlimited damage or loss incidents - and the first replacement sensor is free!

Finally, our large and growing community features tens of leading thinkers and teachers in the fertility space and thousands of STM devotees. If you’re new to STM, or a practiced hand, you’ll find a warm and welcoming space to continue your fertility journey.