About Femometer
Femometer was founded in 2014 by Adam Lou after he and his wife faced infertility and pregnancy loss, and the company built its first product, a basal body thermometer, to give women clearer, data-backed insight into their fertility window. Headquartered in Princeton, New Jersey, the brand has since grown its thermometer line to include tympanic ear thermometers and non-contact forehead thermometers alongside its original basal thermometers, each paired with a companion app for cycle charting and reading history.
In our own testing, three separate Femometer thermometers earned a place across our basal, ear, and infrared roundups, backed by real-world review volume: its non-contact forehead thermometer alone carries an Amazon's Choice badge and more than 21,000 ratings at 4.4 stars. Femometer states its products undergo independent lab testing and are manufactured by cGMP-certified partners meeting FDA standards, and it backs purchases with a 30-day return policy.
Brand website: femometer.com
What Femometer makes
Femometer's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Basal Body Thermometers
digital and app-connected BBT thermometers with 1/100th-degree sensors for ovulation and cycle charting — featured on BestRatedDocs
Ear Thermometers
tympanic thermometers with on-device reading memory and included probe covers — featured on BestRatedDocs
Forehead & Infrared Thermometers
non-contact thermometers that switch between body-temperature and object/ambient readings — featured on BestRatedDocs
Femometer App
the brand's companion app for cycle charting, ovulation prediction, and cloud reading history
Smart Rings
Bluetooth-connected rings that record basal temperature continuously overnight
Fertility Vitamins & Supplements
prenatal and conception-support supplements sold alongside the brand's tracking devices
Why we recognized Femometer
The BestRatedDocs Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our category reviews. Femometer earned it on the strength of the products below, evaluated the same way every product on this site is: assessed against clinical criteria, verified specifications, and real-world user outcomes, and judged on merit.
Femometer products we rated highly
femometer Non-Contact Forehead Thermometer
Carries an Amazon's Choice badge and more than 21,000 reviews at 4.4 stars, one of the most-validated non-contact thermometers we evaluated. A 2-in-1 mode switches between forehead body-temperature readings and object or ambient temperature checks, and a 3-color fever alarm with silent night mode makes it practical for both daytime and overnight use, consistently under 20 dollars.
Read the 7 Best Infrared Thermometers of 2026 guide →
Femometer Tympanic Ear Thermometer
Stores 30 readings on-device, the deepest on-device memory of any ear thermometer in our review, and ships with 24 probe covers, more than any other model we tested. A Fahrenheit/Celsius switchable display and five color options round out a tympanic thermometer validated by more than 2,600 Amazon reviews.
Read the 7 Best Ear Thermometers of 2026 guide →
femometer Digital Basal Body Thermometer for Ovulation
Pairs a clinically tested 1/100th-degree sensor with Femometer's own charting app and cloud history, giving readers structured cycle charts without paying for Bluetooth sync. It's waterproof, easy to clean, and backed by a one-year warranty that's uncommon at this price, with a 4.3-star average across 341 reviews.
Read the Best Basal Body Temperature Thermometers of 2026 guide →What earned Femometer the recognition
- Three separate Femometer thermometers earned recognition across our basal, ear, and infrared thermometer reviews, breadth earned across the catalog rather than on a single product.
- Its non-contact forehead thermometer carries an Amazon's Choice badge and more than 21,000 verified reviews at 4.4 stars, one of the most-reviewed non-contact models we evaluated.
- Its tympanic ear thermometer stores 30 readings on-device, the deepest on-device memory of any ear thermometer in our review, and ships with 24 included probe covers.
- Femometer states its products undergo independent lab testing and are manufactured by cGMP-certified partners meeting FDA standards.
- Founded in 2014 to give women clearer, data-backed insight into their fertility window, the brand has since built out a full line of basal, ear, and forehead thermometers paired with its own charting app.