The Five Best Basal Thermometer for 2019

Best basal thermometer

Who makes the best basal thermometer? Who uses these thermometers? And why? If you
have questions about the best of basal thermometers, keep reading and learn a lot more!

We picked the five best basal thermometers. Check out our product descriptions and
find our final recommendation at the end of the article.

#1. The Fitness Family Clinical Digital Thermometer

Editor Rating

This basal thermometer was designed with the user’s comfort in mind. Whatever way you
choose to take you temperature, the Fitness Family Clinical Digital Thermometer aims to be just as gentle as it is accurate.

This thermometer is a brand new product - just released in 2017. It meets FDA guidelines for use as a medical device. The product also has a CE Mark, which means it’s approved for sale and medical use in Europe.


  • Medical grade technology.
  • Made from safe, mercury free materials.
  • Flexible tip for convenient, versatile operation.
  • Can be used for tracking ovulation.
  • Simple user interface - just press one button and get a reading.
  • Takes temperatures orally, rectally, and axillary.
  • Fast - takes about 15 seconds to get a reading.
  • Memory function records previous temperature.
  • Displays temperature results in Celsius or Fahrenheit.
  • Good for use at home or in professional medical environments.
  • Softly beeps at conclusion of taking temperature.
  • FDA and CE Approved.
  • Comes with an included carrying case.


  • No back-lit screen - may need extra light to read temperature.
  • Does not come with any charts to help track fertility.
  • Temperature recalled by memory function only displays for a few seconds.

#2. Smart Basal Thermometer by Femometer

Editor Rating

Femometer made their basal thermometer to help you plan your pregnancy. Their thermometer claims accuracy up to 1/100th of a degree. This precision level measurement keeps a meticulous record of temperature progression. This exactness is key to successful fertility

This BBT thermometer is specifically shaped for a female’s comfort. The compact “lipstick”
design makes for gentle insertion. It’s made from antibacterial materials to ensure your safety.

Since chance of pregnancy is influenced by more than just body temperature, Femoeter’s basal thermometer also keeps track of other “daily body symptoms,” such as:

  • Period start and end
  • Sexual activity
  • The correlation and effects of emotion, sleep, weight, and medication on pregnancy planning

All you do is set an alarm on your app to remind you when to take your temperature. Then, take the temperature via your preferred method. The thermometer takes care of the rest. Your data uploads instantly and you can check it on your smart device.


  • Highly sensitive technology produces precise temperature readings (±0.09℉ accuracy.)
  • Digital fertility tracking for natural family planning.
  • Comes with companion app for your smart phone.
  • Convenient alarm reminds you when to take your temperature.
  • Takes a reading in about 90 seconds.
  • Memory stores up to 300 BBT temperature readings.
  • Approved for use by the FDA, CE (Europe) and CNAS (China.)
  • Automatically turns on and off.
  • No need to read a small screen - just check the info in the app.
  • Information from thermometer syncs to your electronic device(s) via Bluetooth.
  • Gathers intelligent data that can chart BBT, calculate conception rate, and predict ovulation.
  • Records additional “daily body symptoms” along with BBT to help predict ovulation.
  • Data is automatically transferred to secure cloud storage.
  • Comes with a monthly calendar to track progress and keep notes.
  • Backed by a 1 Year “Quality Service Guarantee” (by the manufacturer, Femometer.)


  • Requires internet or Bluetooth connection.
  • Need to download app in order for thermometer to work.
  • Can only read temperature and other data on app - no info directly on thermometer.
  • No visual indication that your temperature has been taken - just a series of beeps.
  • No way to turn off sound.
  • Some users report issues with data syncing.
  • App’s predictions are not always 100% accurate.

#3. Generation Guard Basal Thermometer

Editor Rating

Generation Guard’s Basal Thermometer is made for measuring BBT and fertility tracking. With clinically tested accuracy up to 1/100th of a degree, this digital thermometer is ideal for family planning.

It has a large LCD screen for easy to read results. A few soft beeps indicate when the
temperature reading is complete. Use the data that this accurate thermometer produces to track fertility and predict ovulation. Along with temperature, this thermometer records the time and place the reading was taken.


  • Accuracy up to +/- 0.05℉.
  • Records basal and fertility temperature.
  • Helps figure out your “fertility window” for best chances of pregnancy.
  • Made from waterproof material.
  • Recalls most recent temperature taken.
  • Medically calibrated, tasted, and certified safe to use by the FDA and the European CE.
  • Quietly beeps when temperature is complete - sound won’t disturb people around you.
  • Comes with an included carrying case.


  • No back-light. Difficult to use in early morning (ideal time for tracking fertility) or in the dark.
  • Need to hold down button to display last temperature taken.
  • Takes a little while to record a temperature.
  • While ideal for family planning, it doesn’t come with any companion materials like other

#4. Clinical Basal Thermometer - BBT-113A2A by iProvèn

Editor Rating

The Clinical Basal Thermometer by iProven is made to be the “perfect companion for family planning.” The manufacturer does not recommend this tool for everyday medical applications. It is specifically designed to track ovulation and help with planning pregnancy.

This highly-sensitive device is described as an “actual temperature thermometer.” It measures BBT accurately within 1/100th of a degree.

It can take up to a minute to get a reading with this thermometer, but that’s intentional. Rather than opting for a quick temperature measurement, the technology takes it’s time to record an accurate reading. This eliminates potential errors and gives you the right information you need while planning for a family.

Why does slow make sense? If you're taking your temperature orally, the air you breathe in-and-out of your mouth actually cools down your mouth tissue. This can lead to a reading that is inaccurate by up 0.2-0.5 degrees.

While this slight difference isn’t a big deal if you’re just checking for a fever, these increments matter a lot when your tracking ovulation. So, iProven designed a thermometer that took this discrepancy into account - and all it takes is a little more time.


  • Intelligent digital algorithm eliminates room for error when taking an oral temperature.
  • Produces supremely accurate temperature readings.
  • Provides a reliable reading each time.
  • Smooth, small design for gentle oral use.
  • Flexible, “soft” tip for additional comfort.
  • Simple user interface - just press one button to take a reading.
  • Memory function recalls the last temperature taken.
  • Compact size for easy, convenient travel.
  • Comes with a hard storage case included.
  • Backed by a “Promise of Quality, Education and Simplicity.” If you’re unhappy with your
    purchase, the manufacturer (iProven) will provide a “a hassle-free refund within 100 days from
    your purchase.”


  • Takes longer than other thermometers, up to a minute.
  • Not designed or recommended for everyday medical applications.
  • No back-light can make the LCD screen hard to read.

#5. MABIS Basal Thermometer

Editor Rating

This digital basal body temperature thermometer is a convenient tool for natural family planning. This device helps you by recording your daily BBT. It comes with a 12 month supply of ovulation charts to assist you in determining your fertility window. Use this oral thermometer every morning to figure out when ovulation is most likely.

The information is displayed on a large, easy-to- read LCD screen. The accuracy of the thermometer's readings are proven accurate by the FDA. The technology was tested and certified in an International Organization of Standardization (ISO) facility.


  • Soft tone indicates when “peak temperature” is measured - great for fertility tracking.
  • Clinically tested for accurate readings.
  • Takes temperatures orally.
  • Produces a reading in less than a minute.
  • Tests basal body temperature to detect possible ovulation.
  • Memory function recalls the last temperature measured.
  • Powered by a replaceable LR41 long-life battery.
  • Lightweight for easy travel.
  • Comes included with a clear, hard shell plastic carrying case.


  • Tip of thermometer may easily break if the device is dropped or mishandled.
  • No back-light may make it difficult to read temperatures in the dark or in low light.
  • Temperature indication beeps are very quiet - may be difficult to hear, especially if measuring
    temperature vaginally.
  • Buttons on the thermometer are small - may be difficult for people with large fingers to use.

What is a Basal Thermometer? What is Best Basal Thermometer (BBT)?

A basal body temperature (BBT) thermometer measure your body’s temperature at rest. Ideally, this temperature would be measured while the subject is sleeping.

However, it’s unlikely that you can take your temperature while you're asleep. So, basal
thermometers are best used first thing in the morning.

Using a basal thermometer, you can get a truly accurate measurement of your body’s

Who Uses Basal Thermometers?

While basal thermometers can be used for everyday medical applications, they’re actually
designed with a much more specific purpose in mind.

People who want to start a family often use BBT to help determine when a woman may be her most fertile. This is also referred to as tracking ovulation. Knowing when a woman is most likely fertile can lead to successful impregnation.

This information can be especially helpful to couples who are having trouble getting pregnant. It may also assist women who have potential health risks associated with pregnancy.

If you or a loved one are trying to get pregnant and start a family, be sure to consult your doctor. While a basal thermometer is an essential tool in charting fertility, only a medical professional can help you safely have a child.

How Do You Use a Basal Thermometer to Track Ovulation?

A woman’s body temperature increases a day or two before she is most fertile. Using a basal
thermometer, a woman can chart her BBT. Charting this information may help a woman predict her ovulation cycle.

The data collected by a basal thermometer lets you analyze the best potential times for
pregnancy. Monitor and track your BBT for an increased chance of getting pregnant.

How Do You Use a Basal Thermometer to Get an Accurate BBT Reading?

Here’s the steps you should take if you want to get the most accurate BBT reading:

  • Measure your temperature the moment you wake up.
  • Take your measurements at the same time everyday.
  • Stay in bed. Don’t move around before getting a reading.
  • Don’t eat or drink before or while measuring your temperature.
  • Get at least three hours of uninterrupted sleep the night before.

If you’re using an oral method of temperature taking, also make sure you:

  • Keep your mouth closed throughout the reading.
  • Don’t eat, drink, or brush your teeth before the reading.
  • Make sure the thermometer’s tip is placed on the roof of your mouth, at the top of either cheek.
  • Continue taking your temperature up to a minute after your thermometer indicates it’s done working.

It’s also important to be aware of factors (aside from ovulation) that may increase your BBT.
These could include emotional stress, an infection, or lack of sleep.

Watch These Videos And Learn More

heidikimTV can teach you How To Track Ovulation With Basal Body Temperature. 

Victoria FemmeHead has tips on What to Look For in a BBT Thermoeter.


We like each of the basal thermometers we’ve reviewed here - otherwise, they wouldn’t be on our list! But, if you’re stuck on which of these basal thermometers are right for you, check out this round-up:

  • The Fitness Family Clinical Digital Thermometer is medical grade, gentle and flexible. It works fast and can be used in several ways. But the screen isn’t back-lit and it doesn’t come with any extra medical charts or apps.
  • Smart Basal Thermometer by Femometer is a premium piece of technology. It’s made with a woman’s comfort in mind. The companion app helps keep track of fertility data. It’s an attractive and intuitive device - but if you’re not tech savvy, you may prefer a basic basal thermometer.
  • Generation Guard Basal Thermometer provides a very accurate reading and recalls temperature data. It’s designed to aid couples in having a baby. The thermometer is simple, straightforward and designed to help you figure out the best time to conceive. It’s not ideal if you’re short on time, and it doesn’t come with companion materials.
  • Clinical Basal Thermometer - BBT-113A2A by iProvèn relies on a patient, thorough temperature taking process, so you can get the most accurate reading possible. If degrees matter during your paternity planning, this could be the basal thermometer for you. However, it’s not designed for everyday temperature applications.
  • MABIS Basal Thermometer has been tested and approved for safe use. It’s made to be used quickly and easily. It comes included with a 12 month supply of fertility charts. However, the ergonomics and materials are not the most comfortable or durable.

And Our Pick for the best Basal Thermometer is…

This Smart Basal Thermometer by Femometer is our top pick for many reasons. We love the intelligent app integration. Forget the paperwork associated with tracking all your ovulation data. Do it digitally.

This is our top pick for many reasons. We love the intelligent app integration. Forget the
paperwork associated with tracking all your ovulation data. Do it digitally.

The Femometer Smart Fertility Tracker gathers all of the data and does the analyzation for you. We feel that Femometer has done the best job eliminating the guesswork associated with fertility tracking.

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