---
product_id: 639003203
title: "femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7"
brand: "femometer"
price: "159364₫"
currency: VND
in_stock: true
reviews_count: 5
url: https://www.desertcart.vn/products/639003203-femometer-ring-for-ovulation-period-and-sleep-tracking-wearable-finger
store_origin: VN
region: Vietnam
---

# Waterproof for all-day wear 9+ days battery life 0.1°C precision temp sensor femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7

**Brand:** femometer
**Price:** 159364₫
**Availability:** ✅ In Stock

## Summary

> 🌙 Track your cycle, sleep, and future with precision—because your body deserves the best.

## Quick Answers

- **What is this?** femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7 by femometer
- **How much does it cost?** 159364₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/639003203-femometer-ring-for-ovulation-period-and-sleep-tracking-wearable-finger)

## Best For

- femometer enthusiasts

## Why This Product

- Trusted femometer brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless App Integration:** Auto-syncs data to the Femometer app for personalized ovulation, period, and sleep analysis anytime, anywhere.
- • **Sleek, Waterproof Design:** Wear it day and night without worry—durable, waterproof, and discreet for your busy lifestyle.
- • **Comprehensive Sleep Monitoring:** Gain deep insights into your sleep stages and receive tailored tips to optimize rest and recovery.
- • **Precision Temperature Tracking:** Continuously measures finger temperature every minute with 0.1°C accuracy for reliable fertility insights.
- • **Long-lasting Rechargeable Battery:** Enjoy up to 9 days of uninterrupted tracking on a single 2-hour charge—no daily hassle.

## Overview

The Femometer Ring SIZE 7 is a rechargeable, waterproof wearable that continuously monitors finger temperature with 0.1°C accuracy to predict ovulation and menstruation. It auto-syncs with the Femometer app for detailed fertility and sleep analysis, offering up to 9 days of battery life on a single charge. Designed for convenience and precision, it empowers women to manage their cycles scientifically without disrupting sleep.

## Description

Full description not available

## Features

- [Fertility Tracking without Disturbing Sleep] Simply wear the ring on your finger to monitor your fertility temperature in real-time. The app automatically syncs data, generating customized fertility charts, predicting menstruation and ovulation to help you prepare for pregnancy and manage your period scientifically.
- [Track and Analyze with Femometer APP] For Android users, please search and download "Femometer Connect", For iOS users, please search and download "Femometer."
- [Sleep Monitoring and Analysis] By collecting sleep data through the app, you will gain an in-depth understanding of your sleep patterns and changes at each stage. The app provides customized sleep analysis and suggestions to help you improve sleep quality according to your body's natural rhythm.
- [High Accuracy & Convenience] Unlike traditional oral thermometers, which take a single temperature measurement, the Femometer ring continuously detects temperature thousands of times a day while you sleep. Femometer's temperature sensor was validated to measure changes as precisely as 0.1°C every minute. This significantly enhances convenience and improves the accuracy of ovulation window and period prediction.
- [Easy to Use] Wear the ring before bed, and sync the data with the app upon waking. View prediction information and history on the app. When the ring's battery is low, place it on the charging base; it will be fully charged in less than 2 hours and can be used for at least 9 days on a single charge!
- [Warm Tips for Buying the Ring] Before purchasing a Femometer ring, we strongly recommend that you buy a size kit to determine the best fit for your finger.
- [What You Get?] femometer Ring x1, Charging base x1, Manual x1, Quick guide x1, Lifetime femometer APP prime (iOS/Android) - Helping women understand their fertility and unique cycle patterns, using science and big data
- [Customer Service] Benefit from our knowledgeable team's support and advice, a 1-year manufacturer's warranty, and ongoing support. Please do not hesitate to contact us with any questions!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | ‎LOLLIPOP TECHNOLOGY (HANGZHOU) CO., LTD. |
| Part number | IRS-101 |
| Item Weight | 200 g |
| Package Dimensions | 8.1 x 7.9 x 7.4 cm; 200 g |
| Batteries | 1 Lithium Metal batteries required. (included) |
| Item model number | IRS101 |
| Size | SIZE 7 |
| Power source type | Battery Powered |
| Display style | No Display |
| Included components | femometer Ring, Charging base, Manual, Quick guide |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium Ion |

## Product Details

- **Brand:** femometer
- **Age range (description):** Adult
- **Included components:** femometer Ring, Charging base, Manual, Quick guide
- **Outer material:** Silicone
- **Display type:** No Display
- **Connectivity technology:** Bluetooth
- **Product care instructions:** Wipe Clean
- **Unit count:** 1.0 count
- **Power source:** Battery Powered
- **Model name:** femometer Ring

## Images

![femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7 - Image 1](https://m.media-amazon.com/images/I/61C4J1e4PTL.jpg)
![femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7 - Image 2](https://m.media-amazon.com/images/I/71FAc354gRL.jpg)
![femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7 - Image 3](https://m.media-amazon.com/images/I/71rVx+5l9HL.jpg)
![femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7 - Image 4](https://m.media-amazon.com/images/I/71Rp5uyk14L.jpg)
![femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7 - Image 5](https://m.media-amazon.com/images/I/71t1Nl1UJkL.jpg)

## Customer Reviews

### ⭐ Burnt my finger
*by K***. on 20 December 2024*

Unfortunately wasn’t right for me. I only wore it at night and it burnt my finger making it really sore. I bought this as I thought it would be easier than remembering to use a bbt thermometer each morning. I appreciate this is finger temperature not bbt but the measurements were far too low each morning so didn’t work for what I needed.

### ⭐⭐⭐⭐⭐ Good luck
*by R***N on 15 January 2025*

Met my ex for a fwb catch up near Christmas and she was in about finding a ring to monitor her ovulation or something. We researched some and this came up decent. She thought it was a gift for her but it's actually for whoever she ends up sleeping with so they don't get stuck with her.Seems to have worked so far so 5 stars all the way lol

### ⭐ The charger was missing
*by B***  on 3 January 2025*

Opened the box upon delivery and the charger was missing so I could not use the ring.

## Frequently Bought Together

- femometer Ring for Ovulation, Period, & Sleep Tracking, Wearable Finger Temperature Monitoring Sensor with App Auto-Sync, Period and Sleep Analysis, Rechargeable, Waterproof - SIZE 7
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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-20*