For people trying to conceive, many different fertility methods can help them track their ovulation cycles and maximize their chances of getting pregnant (or prevent it from happening).
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Fertility trackers can help you plan for pregnancy, prevent it, or sometimes do both.
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Each tracker may use a different method, such as assessing your basal body temperature, hormone levels, menstrual cycle data, or a combination of these metrics.
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Always consider the tracker cost, and accuracy (of both the tracker and the featured method and metrics), as well as your lifestyle when choosing a fertility tracker.
These methods range from using simple charts users can fill out by hand to high-tech gadgets that use sensors to track your body temperature and hormone levels. Some fertility trackers even come with apps that allow users to log their data and receive personalized advice about their cycle.
With many options on the market, it may be hard to decide on which type of tracker to use. And many may wonder if there may be a downside to using one. In this article we’ll review 13 of the most popular fertility trackers on the market, starting with a few insights on how to choose the best one for you.
What to consider when choosing a fertility tracker
Many fertility trackers monitor the same type of data, whether it’s temperature, specific hormones, or even cervical fluids. Determining the best tracker for users means evaluating your budget, how likely you are to incorporate it into your lifestyle, and (of course) the accuracy of the product.
Cost
Fertility trackers can range in price from very affordable to pretty expensive. Be sure to keep your budget when choosing a fertility tracker.
Ease of use
Fertility trackers can vary widely in terms of how easy they are to use. Some require that you input a lot of data, while others are much simpler. Choose a fertility tracker that you will be likely to use consistently (as recommended by the manufacturer).
Accuracy
It is important to choose a tracker that is accurate in its predictions. Remember that fertility trackers are not 100% accurate, but you want one that is as accurate as possible.
To help you make an informed decision, we evaluated some of the most popular fertility trackers on the market. Let's take a closer look at them, how they work, their level of accuracy, as well as some of the pros and cons of each one.
Comparing 13 popular fertility trackers
1. Daysy
Users use this tracker to measure basal body temperature by placing the device under the tongue. A red or green light will indicate their fertility status.
Basal body temperature is the lowest body temperature a person will measure after resting. The basal body temperature increases ~0.5 to 1 degree Fahrenheit shortly after ovulation, returning to normal when menstruation starts. Basal body temperature measurement is one of the simplest, non-invasive, and oldest ways to monitor fertility.
However, temperature measurements must be taken at the same time every day upon waking and they easily fluctuate due to the use of alcohol, stress, illness, and other environmental stressors.
If users thrive with consistency and predictability and will plan to avoid alcohol and other stressors, this method may be for users. It is recommended that users use this method with other fertility methods to improve accuracy.
Metrics
Daysy uses data from 5 million menstrual cycles and an algorithm based on 30 years of research to calculate fertility status.
| Test time | 60 seconds |
|---|---|
| Accuracy | 99 however, the study that supported this claim has been retracted by the Reproductive Health journal. The authors do not agree with this retraction. |
| FDA-approved | No |
| Supporting devices/software | |
| Price | $$$ |
2. Mira Fertility Tracker
Users will need to dip a single-use wand into their urine and then insert it into the Mira analyzer to get their fertility score. Users can test at any time of the day.
The tracker is FSA eligible, which means users may be able to purchase it at no or reduced cost using insurance.
Using the popular Plus version to track both LH and estrogen levels increases the accuracy of predicting fertility. The Mira wand may work well for users who need the flexibility to test their urine each day.
Metrics
The Mira Fertility Tracker Plus tracks user estrogen levels as well as the level of luteinizing hormone to determine their fertility score. (Note that the LH Wands version only tracks the luteinizing hormone.)
An LH surge occurs 35 to 44 hours before ovulation. The peak serum LH level occurs 10 to 12 hours before ovulation. Using a urinary LH test is 97% accurate at detecting ovulation.
Estrogen starts rising 3 to 4 days before ovulation and is considered the best parameter for identifying the onset of the fertile phase.
| Test time | 16 minutes |
|---|---|
| Accuracy | 99 % accuracy |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$ |
3. Inito
To use this tracker, users will need to collect urine, dip a test strip in urine for 15 seconds, attach the Inito monitor to their phone, and insert the strip into the monitor to get their personalized results (in the Inito app).
Inito can track your ovulation regardless of irregularities in a user’s cycle (like PCOS or thyroid issues). Inito helps users predict their fertile days as well as confirm if users do ovulate.
Inito is an effective way for users to easily track changes in 3 key hormones in the ovulation and menstrual cycle. However, Inito only works with iPhone 7 and up.
Metrics
The Inito tracker also measures four fertility hormones – estrogen, LH, FSH, and progesterone on a single test strip to help predict fertile days and confirm that ovulation has occurred.
| Test time | <10 minutes |
|---|---|
| Accuracy | Not provided, but mentions that it correlates well with Ultrasound scans. |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$ |
4. LadyComp
LadyComp users will need to take their temperature each morning and enter “M” on days they are menstruating to view their fertility score.
LadyComp also provides a 6-month forecast of the user's ovulation cycle.
LadyComp is accurate at testing temperatures and quick to use. However, as mentioned before, trackers that rely solely on basal body temperature should be combined with other methods to accurately predict ovulation.
Metrics
It helps users determine their fertility status in addition to cycle statistics such as cycle length, temperature rise, fluctuation rise, and high layer length.
| Test time | 60 seconds |
|---|---|
| Accuracy | 99 % |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$$ |
5. iFerTracker
This tracker is a sensor that is worn under the arm to collect basal body temperature while sleeping.
Not only is basal body temperature subject to environmental stress, but any issues with the adhesive used to attach the sensor to the body can lead to loss of data.
However, users may appreciate not having to test their temperature at the same time every day. Still, this device may work best when used in conjunction with other ovulation tests.
Metrics
It uses an advanced algorithm to help the tracker app to map out each phase of a user’s cycle before they happen.
| Test time | Collects 20,000 data points in the night that users can access once syncing to their device. |
|---|---|
| Accuracy | Measures changes as small as 1/100th of a degree Fahrenheit. |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$ |
6. Eveline Ovulation
Users will need to position the fertility strips that come with the kit under a urine stream for 5 seconds or dip it into urine for 15 seconds. Strips can be read after 5 minutes by clipping them to the smart scanner users will need to attach to their phone.
Tracking the LH surges is a proven way of detecting ovulation. While the Eveline kit helps users determine the results of the strips, it does not provide numerical results. This kit is not for users who may need to closely track hormone levels.
Metrics
The patented PixoTech allows a phone camera to track LH surges. The Eveline app AI technology displays your status, whether a user is at low, high, or at peak fertility.
| Test time | ~10 minutes |
|---|---|
| Accuracy | 99 % |
| FDA-approved | Yes |
| Supporting devices/software | 1-month supply that includes: |
| Price | $ |
7. Clearblue Fertility Monitor
To use this kit, users will need to dip the Clearblue Fertility Monitor Test Sticks into a urine sample to track estrogen and luteinizing hormone levels, and then read the results on the touchscreen monitor.
The monitor is advertised to detect all fertile days, and has been proven to increase chances of conceiving by 82%.
The monitor does not have an app, which means there is a risk of losing data if batteries are not replaced when indicated by the device. It also requires consistently measuring at a required time in the day. However, it is relatively easy to use and accurate.
Metrics
Uses a urine sample to track estrogen and luteinizing hormone levels.
| Test time | 5 minutes (after urine collection) |
|---|---|
| Accuracy | 99% accurate at detecting LH surge. 97% agreement with ultrasound at detecting ovulation. |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$ |
8. TempDrop
Users will need to wear the TempDrop armband just below the armpit while sleeping, and then sync to the TempDrop app to collect and view results.
Using this device eliminates the need to consistently monitor temperature at the same time daily. However, as with all basal tracking methods, TempDrop should be used with other methods for accurately detecting fertility windows.
Metrics
TempDrop is also HSA/FSA eligible.
| Test time | The device continuously monitors temperature during sleep. |
|---|---|
| Accuracy | Not provided. |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$ |
9. Ovucore
With this tracker, users will have to use the OvuSense like a vaginal insert. Users will need to remove and clean the sensor upon waking and tap it on the phone to download data to the device.
A subscription is required for the app to download data from the sensor.
OvuSense may be best for users with irregular cycles (such as those with PCOS), who also want to avoid having to be required to take tests at a specific, consistent time. However, the requirement for a subscription may turn off some users, especially with the high cost of the tracker itself.
The tracker is FSA/HSA eligible, however, so some users may use insurance to offset the costs.
Metrics
The kit tests levels of LH as low as 25 mIU/mL in 3 to 5 minutes.
| Test time | The Ovucore sensor has to be worn overnight. Data can be synced to a phone upon waking. |
|---|---|
| Accuracy | 96% accurate at alerting users 24 hrs before ovulation. 99% accurate at identifying your 8-day fertile window. |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$$ |
10. kegg
The kegg device is advertised as both a fertility tracker and a kegel ball. To use, users will need to insert the device into the vagina for 2 minutes (while practicing kegel exercises), then hold it near the phone to transfer the data to the app.
The kegg is a very simple device to use with little room for user error. It only requires insertion for 2 minutes, versus overnight. However, the exact accuracy of kegg has not been provided.
It may be best to use kegg with other methods of monitoring fertility and ovulation.
This tracker is also FSA/HSA eligible.
Metrics
Cervical fluid changes over the fertility cycle as estrogen and progesterone levels change. The kegg tracker measures the changes in the electrolyte levels of the cervical mucus. The device uses low-level electrical pulses to sense how the cervical fluid is affected.
| Test time | 2 minutes |
|---|---|
| Accuracy | Not provided |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$$ |
11. Easy Home Ovulation
Users will need to dip the test strip into urine for 5 to 10 seconds, check the result after 5 minutes, and then snap a picture to keep in the Premom app. The Premom App will align valid test results to easily allow users to view your progress, and menstrual, and fertility cycles. There are also midstream test products available that don’t require using a cup.
Users have to test between a specific window (10 AM to 8 PM) and are encouraged to test twice a day to avoid missing their LH surge.
The test kit is also FSA-eligible.
For users on a tight budget, this is the most affordable method for capturing cycle data with proven accuracy.
Metrics
The kit tests levels of LH as low as 25 mIU/mL in 5 to 50 minutes.
| Test time | 5 minutes |
|---|---|
| Accuracy | 99 % |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $ |
12. Ava Tracker Bracelet
The Ava Tracker Bracelet is worn just like a watch/bracelet while users sleep (for at least 4 hours).
The Ava tracker is perhaps one of the easiest options. It is used similarly to devices most are accustomed to (such as bracelets and watches). This also reduces human error and may encourage consistent usage.
There are numerous customer complaints, which may be a concern for those considering purchasing the tracker.
Metrics
The tracker Identifies your 5-day fertile window through wrist skin temperature and lets users know 4 days earlier than LH tests. Ava also tracks sleep, stress, and symptoms and provides users with access to an online community.
Wrist skin temperature measurements are more sensitive than basal body temperature measurements in monitoring ovulation.
| Test time | The tracker collects data in real-time while being worn. |
|---|---|
| Accuracy | 90% accurate at identifying a 5-day fertile window. |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $$$ |
13. Natural Cycle Plan a Pregnancy Kit
Users will need to take their basal temperature upon waking and enter it into the app to get their fertility status for the day. Users will use the LH tests to measure surge 24 to 48 hours before ovulation occurs, as prompted by the app. Users will also be prompted to take a test if the temperature data algorithm detects a potential pregnancy.
This kit is a considerably affordable option. It is a holistic method of monitoring all key aspects of the fertility and menstrual cycles.
Natural Cycles is recommended for users who don’t mind combining multiple methods to track fertility and who can consistently monitor their temperature daily, which is the foundation of the Natural Cycles plan.
Metrics
The kit combines basal temperature measurements, luteinizing hormone (for ovulation), and human chorionic gonadotropin hormone levels (for pregnancy), along with an app for monitoring data.
| Test time | Seconds for basal temperature. A few minutes for the ovulation or pregnancy tests. |
|---|---|
| Accuracy | 93% effective with typical use. 98% effective with perfect use. |
| FDA-approved | Yes |
| Supporting devices/software | |
| Price | $ |
When choosing a tracker, it is important to consider your individual needs. Evaluate the cost, the accuracy of the tracker, and how easy it will be for you to incorporate it into your lifestyle. By keeping these factors in mind, you can narrow down the field and choose the best fertility tracker for you.
- Human Reproduction. Prediction of ovulation by urinary hormone measurements with the home use Clearblue Fertility Monitor: comparison with transvaginal ultrasound scans and serum hormone measurements.
- European Journal of Contraceptive Reproductive Health Care. Short- and long-term effect of contraceptive methods on fecundity.
- Journal of Medical Internet Research. Wearable sensors reveal menses-driven changes in physiology and enable prediction of the fertile window: Observational study.
- National Library of Medicine. Mucus observations in the fertile window: a better predictor of conception than timing of intercourse.
- Reproductive Health. Improving usability and pregnancy rates of a fertility monitor by an additional mobile application: results of a retrospective efficacy study of Daysy and DaysyView app.
Show all references
- Fertility and Sterility. Quality index assessment of vaginal temperature based fertility prediction and comparison with luteinising hormone testing, ultrasound folliculometry and other home cycle monitors.
- Fertility and Sterility. Increased pregnancy rate with use of the Clearblue Easy Fertility Monitor.
- European Journal of Contraceptive Reproductive Health Care. Monitoring the menstrual cycle: Comparison of urinary and serum reproductive hormones referenced to true ovulation.
- Journal of Thermal Biology. The use of wearable devices for predicting biphasic basal body temperature to estimate the date of ovulation in women.
- Fertility and Sterility. Accuracy of wrist-worn medical devices to identify fertile window and ovulation day.
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