femometer Smart Ring Gen2 Ceramic | Sleep, Heart Rate & Cycle Monitoring with Free Subscription | Women's Health & Fertility Tracker with BBT Technology | Size Before You Buy - Size 8
Condition: New
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$33.17
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- – 6-month term
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 10 left in stock, order soon!
Arrives
Friday, Dec 12
Recently Viewed
Color: Gold
Size: Size8
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: 3.35 x 3.23 x 2.52 inches
Item Weight: 0.131 ounces
Item model number: 42616f15-b2f2-4c4a-9f45c
Batteries: 2 C batteries required. (included)
Date First Available: September 27, 2024
Manufacturer: LOLLIPOP TECHNOLOGY (HANGZHOU) CO., LTD
Item Weight: 3.7 Grams
Standing screen display size: 1.0
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Dec 12
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.
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
Learn more about financing & leasing here.
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Top Amazon Reviews
Color: Gold
Size: Size8
This ring is comfortable and easy to use with a lovely app that shows you so much information about your body. I love the BBT for tracking ovulation cycles. Now that we are pregnant I also love the information about our baby's growth and development! It is waterproof, the sleep tracking and battery life are great. It has proven to be very accurate as well.
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Reviewed in the United States on October 29, 2025 by B.Ring31
Color: Gold
Size: Size7
really love this health ring! It’s super comfortable and tracks so many things. My favorite feature is the body temperature tracking — it’s so much easier than taking my temperature every day manually. I also like that the app lets you track pretty much anything you can think of, from calories and moods to symptoms, sex days, and even cervical mucus. It gives a really complete picture of your health. Another thing that really impressed me was the customer service. They actually reached out to ask for feedback so they could improve the app and product, which made me feel like they genuinely care about their customers. Overall, I’m very happy with this purchase and definitely recommend it!
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Reviewed in the United States on November 11, 2025 by Mia Mia
Color: Gold
Size: Size6
No scratch resistant as described. I can't find the way to change my weight.
Reviewed in the United States on September 20, 2025 by leslie m.
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…
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Reviewed in the United States on August 10, 2025 by Destany & Thomas
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.
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Reviewed in the United States on July 17, 2025 by Joseph
Color: Gold
Size: Size9
I waited to write this review to give this product a fair shake, but honestly I don't understand the hype. It is thick which is expected but takes some getting used to and if you deal with any swelling like myself this ring feels like a claustrophobic torture device in the middle of the night. I am struggling to see the benefits of it. I was using it to try and help track ovulation along with other products as well as my wonky sleep but it can't provide me any helpful information. I know I have poor sleep I didn't need it to know that. I just feel like depending on your goals there are other more beneficial products on the market. Also note they HIGHLY advertise there is no subscription needed and that is a lie, in order to use the app and see your results you much purchase a subscription before you can even create a profile!!
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Reviewed in the United States on October 22, 2025 by Kara Jones
Color: Gold
Size: Size8
I’m a huge fan of this product and the accompanying app. The ring is lightweight and attractive, the data has been accurate so far, and the app has a wealth of information to help inform and educate women about their bodies. You do have to charge the device every couple days depending on how often you refresh the data, but that wasn’t a problem for me.
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Reviewed in the United States on November 13, 2025 by mamabear22
Color: Gold
Size: Size9
My first one died after a week or two. It wouldn’t charge or sync, and the ceramic cracked. I requested a replacement. After a brief delay (it was out of stock), the manufacturer sent me a new one. I quickly realized it was not very waterproof- I accidentally forgot to remove it while doing dishes. It had to spend some quality time drying in a bag of rice before it would charge again. The battery is supposed to last a few days. It lasts less than one day, so I can only wear it to bed and remove it during the day, much like a Tempdrop. So the activity tracking doesn’t really matter. The sleep data has trouble syncing with Apple Health. The sleep duration does, but Apple can’t interpret the sleep stage data. See photos. The first one is Apple Health. The second one is the Femometer app.
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Reviewed in the United States on October 19, 2025 by Dr. Anne Dr. Anne