Basal Body Temperature

iFertracker continuously monitors body temperature overnight to establish true Basal Body Temperature, which has been found to occur prior to awaking. Moreover, the device pairs with the iFertracker app to provide accurate predictions ahead of time for both your fertile window and ovulation day. Data syncs via Bluetooth and the app automatically converts it into an easy-to-read BBT chart. It’s easily and comfortably worn under the arm overnight and our advanced algorithm filters out any noise, providing you with unrivaled convenience and accuracy.

No more worrying about waking up in the middle of the night or not moving a muscle in the mornings so you can get an accurate temp! Stay in bed a little longer. Go get that glass of water at 3am. Snuggle up to your significant other before work. FINALLY, you can sleep in without worrying about ruining your BBT.


For any stage of your journey

  • Trying to conceive

    This is our self-proclaimed area of expertise. We’ve helped countless couples get pregnant, some after years of trying with no luck!

  • Natural Family Planning

    iFertracker is applicable for both the Fertility Awareness Method (FAM) and the Sympto-thermal Method of Natural Family Planning. Get a more accurate BBT than traditional oral thermometers, plus record physiological fertility changes in our health log such as cervical mucus, sleep quality, and more.

  • Hormone tracking during pregnancy

    Continue using iFertracker after getting pregnant! It can help you monitor hormone levels during the crucial beginning phases and you can share BBT charts with your doctor to evaluate and promote the health of your pregnancy.

  • Postpartum return to full fertility

    Whether you’re breastfeeding or not, its nice to know when your cycle will return to normal during the postpartum period. You can use iFertracker to monitor your hormones after pregnancy and get an idea of when your ovulatory cycles will return.


What makes us different?

Clean, easy-to-read fertility charts
The iFertracker captures subtle changes in core temperature, which allows it to very clearly outline and color code each phase of your cycle, including: Menstruation, Follicular & Luteal phases, Fertile Window, and Ovulation day.

Fertile Window prediction and notifications
The app will tell you when you’re most fertile and predict actual ovulation day, ahead of time.

Continuous Temperature Monitoring and Wireless Syncing
1.iFertracker monitors temperature continuously overnight
2. The device syncs with your smartphone via Bluetooth (BLE 4.0) in the morning
3. Data is uploaded to the cloud, analyzed by our algorithm, and sent back to your app in under a minute