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femometer

femometer Smart Ring Gen2 - Sleep, Heart Rate & Cycle Monitoring - Free Subscription - Women's Health & Fertility Tracker with BBT Technology - Size Before You Buy - Up to 7 Days Battery Life - Size 9

  • Based on 110 reviews
Condition: New
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$199.00 Why this price?
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To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Sep 22 – Sep 23
Order within 12 minutes
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Color: Gold


Size: Size9


Features

  • 24/7 HEALTH COMPANION: Continuous heart rate monitoring and HRV tracking provide stress insights and health trends. Track daily activity, steps, and calorie burn. All health data syncs seamlessly with the lifetime free femometer app.
  • PROFESSIONAL SLEEP INSIGHTS: Track sleep stages (Deep, Light, REM), blood oxygen levels while you rest. Get detailed sleep scores and personalized recommendations.
  • ADVANCED CYCLE TRACKING: Revolutionary BBT technology with 1,400+ nightly temperature measurements provides accurate cycle predictions and ovulation detection. Part of trusted femometer ecosystem with 15M+ women worldwide.
  • COMFORT MEETS ELEGANCE: Just 2.7mm. Premium ceramic exterior with aluminum core ensures durability while weighing only 3.3g. Scratch-resistant, water-resistant to 100m, and designed for 24/7 wear. Size First with femometer Sizing Kit.
  • SIMPLE & RELIABLE: Up to 35-day battery life with quick charging case (stores 5 full charges). Pair with femometer app to get lifetime subscription. Compatible with iOS and Android. Includes 1-year warranty and dedicated customer support. Regular firmware updates ensure continuous improvement.

Operating System: Wear OS 3.0


Special Feature: Activity Tracker


Battery Capacity: 21 Milliamp Hours


Connectivity Technology: Bluetooth


Wireless Communication Standard: Bluetooth


Battery Cell Composition: Lithium Ion


GPS: No GPS


Shape: Round


Screen Size: 1.0


Brand: femometer


Package Dimensions: 3.2 x 3.2 x 2.4 inches


Item Weight: 0.141 ounces


Item model number: Gen2


Batteries: 2 C batteries required. (included)


Date First Available: September 27, 2024


Manufacturer: LOLLIPOP TECHNOLOGY (HANGZHOU) CO., LTD


Item Weight: 4 Grams


Standing screen display size: 1.0


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sep 22 – Sep 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • amazing product!!
Color: Gold Size: Size8
loooove this product so much! my femometer has changed the game for me when it comes to tracking my cycle and other health data. it is very easy to use and is so accurate! typically, for biometric rings it is advised to wait at least 60 days after purchase for accurate female data, however, my femometer has been accurate since the very start! that impressed me right off the bat. it holds a charge for up to 4-5 days and then when you put it in the charging case it charges fully within a couple hours! i love how slim the ring is. it is very comfortable and most of the time i barely even notice that i’m wearing it. i love that there is no app subscription. i would 100% recommend this to any woman who wants to track their cycles or even just their sleep/health data. ... show more
Reviewed in the United States on July 17, 2025 by Joseph
    • Happy Camper!
Color: Gold Size: Size9
Super happy with my purchase. I was a little skeptical with all the negative reviews but I’ve had my ring for a few weeks now and I can say I am happy with my purchase. I absolutely love the color and look of this ring. You don’t see very many white smart rings on the market. The tracking is accurate and I enjoy the extra content you get within the app. I think this is just as good if not better than more expensive rings on the market! A lot of other rings don’t include cycle tracking without purchase of other apps. Best all in one ring for females! ... show more
Reviewed in the United States on May 13, 2025 by Katrina Minard
    • GOOD SMART RING
Color: Gold Size: Size7
Fits comfortably without falling off. Connects easily to my phone. The case is extremely helpful at the end of the day when you prefer to take it off. It is easy to charge and the battery life is good. The color is color as depicted and it’s overall well-made. It seems durable and has done a good job so far. I have mixed feelings on the value. ... show more
Reviewed in the United States on April 17, 2025 by Jesse
    • Cheap quality not worth the price tag
Color: Gold Size: Size9
If I could give a zero I would. I had this ring for a month literally and the outside ring cracked, I don’t do any heavy lifting or anything with it on. Then I went to take it off and the whole outer portion just came off leaving the inner portion of the ring still on my finger. It also doesn’t do anything unless you constantly sync it. So in order for it to even register your bbt you have to go into the app everyday every morning and the whole point in buying this was so that I wouldn’t have to go into an app and input this stuff. Also the battery is terrible last 3 days at the most. Don’t waste your money it’s not worth it. Just buy and Oura ring… ... show more
Reviewed in the United States on August 10, 2025 by Destany & Thomas
    • Size up
Color: Gold Size: Size7
I love the ring but I would definitely size up. My ring finger is a size 6/7 but the 7 is super tight.
Reviewed in the United States on July 27, 2025 by Amanda S. Fitzpatrick
    • Unless Your trying to conceive, not worth your money
Color: Gold Size: Size8
More so for women who are trying to have a baby. The sleep/stress/heart rate, etc is minimal and it didn't even work.
Reviewed in the United States on May 29, 2025 by Gabrielle
    • Good fertility tracker!!
Color: Gold Size: Size8
Review Image by Picky is my middle name Picky is my middle name
Review Image by Picky is my middle name Picky is my middle name
Great tracker! I have been using it for a few months and love it. The app is very straightforward. You also get lifetime subscription of the app with this ring, which is awesome! I am using postpartum and it’s very helpful!! I have not had any issues with it. I recommend trying it!
Reviewed in the United States on April 21, 2025 by Picky is my middle name Picky is my middle name
    • Amazing
Color: Gold Size: Size9
Review Image by 7046157361 7046157361
I love everything about this ring and would buy it over and over again
Reviewed in the United States on July 21, 2025 by 7046157361 7046157361

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