Femometer Gen2 Smart Ring Review: Advanced Cycle, Sleep & Health Tracking for Women

Discover the Femometer Gen2 Smart Ring with advanced BBT cycle tracking, sleep and heart rate monitoring, long battery life, premium ceramic build, and a free lifetime app.

Review
29. Dec 2025
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Femometer Gen2 Smart Ring Review: Advanced Cycle, Sleep & Health Tracking for Women















The Femometer Gen2 Smart Ring is designed as a discreet yet powerful health companion for women who want deeper insights into their daily wellness, sleep quality, and reproductive health. Unlike bulky wearables, this smart ring focuses on comfort, elegance, and precision. Built with a premium ceramic exterior and backed by Femometer’s well-established women’s health ecosystem trusted by over 15 million users worldwide, the Gen2 Smart Ring combines science-backed fertility tracking with modern health monitoring features — all without any monthly subscription fees.

Femometer Gen2 Smart Ring Features

Advanced Cycle & Ovulation Tracking with BBT Technology

At the core of the Femometer Gen2 Smart Ring is its advanced Basal Body Temperature (BBT) technology. The ring captures over 1,400 temperature measurements each night, allowing it to detect even the slightest hormonal changes. This enables accurate cycle predictions, ovulation tracking, and fertility window insights. For women planning pregnancy or simply wanting to understand their cycle better, this level of precision makes a meaningful difference compared to basic period trackers.

24/7 Heart Rate and HRV Monitoring

The ring continuously tracks heart rate and Heart Rate Variability (HRV) throughout the day and night. These metrics help users understand stress levels, recovery patterns, and overall cardiovascular health. By syncing seamlessly with the Femometer app, trends are presented in a clear and easy-to-understand format, helping users recognize long-term changes rather than just daily numbers.

Professional Sleep Tracking and Oxygen Monitoring

Sleep monitoring is another strong area of the Femometer Gen2 Smart Ring. It tracks deep sleep, light sleep, and REM stages, while also monitoring blood oxygen levels during rest. The app generates sleep scores along with personalized suggestions, helping users improve sleep habits and overall recovery. For women balancing busy schedules, this insight can be extremely valuable.

Lightweight, Durable, and All-Day Comfort

With a thickness of just 2.7mm and weighing around 3.3 to 4 grams, the ring feels almost invisible on the finger. The premium ceramic finish paired with an aluminum core ensures durability without compromising comfort. It is scratch-resistant and water-resistant up to 100 meters, making it suitable for daily wear, workouts, and even swimming.

Long Battery Life with Convenient Charging Case

The Femometer Gen2 Smart Ring stands out with its impressive battery efficiency. A single charge can last up to 7 days, while the charging case can store up to 5 full charges, extending usage up to 35 days without needing a wall socket. This makes it ideal for travel and long-term use without frequent charging interruptions.

Seamless App Experience with Lifetime Free Subscription

Unlike many smart wearables that lock advanced features behind a paywall, Femometer offers a lifetime free subscription to its app. The ring connects via Bluetooth to both Android and iOS devices, providing continuous updates, firmware improvements, and reliable customer support, all included with the purchase.

Femometer Gen2 Smart Ring Price in the US

The Femometer Gen2 Smart Ring is priced at $199.00 in the United States. It is available on Amazon and other major online platforms. Considering the absence of subscription fees and the depth of health and fertility tracking features, the pricing remains competitive within the smart ring category.

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Femometer Gen2 Smart Ring Review

The Femometer Gen2 Smart Ring delivers a focused and thoughtful experience, especially for women who prioritize reproductive health alongside general wellness. Its cycle tracking accuracy stands out due to the high-frequency BBT measurements, which feel more medically relevant than algorithm-only predictions. Sleep tracking is detailed and practical, offering insights that can genuinely improve daily routines.

Comfort is another major strength. The slim profile and lightweight design make it easy to wear around the clock, even during sleep. The ceramic build not only looks premium but also holds up well against daily wear and water exposure. While it does not offer GPS or a display like smartwatches, that minimalism feels intentional rather than limiting.

The Femometer app complements the hardware well, presenting complex health data in a clear and supportive way. For users who want health insights without ongoing subscription costs, this ring offers long-term value and peace of mind.

Femometer Gen2 Smart Ring Pros and Cons

Pros

  • Highly accurate cycle and ovulation tracking using BBT technology
  • Lifetime free app subscription with no hidden fees
  • Lightweight, slim, and comfortable for 24/7 wear
  • Strong sleep and blood oxygen monitoring
  • Long battery life with multi-charge case

Cons

  • No GPS or display for real-time stats
  • Requires correct sizing for optimal accuracy

Should you buy Femometer Gen2 Smart Ring?

If your priority is understanding your menstrual cycle, fertility, sleep quality, and overall health without wearing a bulky smartwatch, the Femometer Gen2 Smart Ring is a strong choice. It is especially suitable for women who want clinically relevant insights, long battery life, and a subscription-free experience. However, if you are looking for advanced fitness metrics or GPS-based activity tracking, a smartwatch may be a better fit.

Final Verdict

The Femometer Gen2 Smart Ring strikes an impressive balance between elegance, comfort, and intelligent health tracking. Its strength lies in accurate cycle monitoring, meaningful sleep insights, and stress tracking, all wrapped in a discreet and durable design. With a one-time price of $199 and no subscription costs, it offers excellent long-term value. For women seeking a reliable, science-backed wearable focused on wellness and fertility, the Femometer Gen2 Smart Ring is a smart and thoughtful investment.

FAQs

Q1: What makes the Femometer Gen2 Smart Ring different from other smart rings?

The Femometer Gen2 focuses heavily on women’s health, especially cycle and ovulation tracking using advanced BBT technology, and it offers a lifetime free app subscription.

Q2: Does the Femometer Gen2 Smart Ring require a monthly subscription?

No, all features are available with a lifetime free Femometer app subscription, with no hidden or recurring charges.

Q3: How accurate is the cycle and ovulation tracking?

The ring takes over 1,400 temperature measurements each night, allowing highly accurate cycle predictions and ovulation detection compared to basic period trackers.

Q4: How long does the battery last on the Femometer Gen2 Smart Ring?

The ring lasts up to 7 days on a single charge, while the charging case provides up to 35 days of total usage.

Q5: Is the Femometer Gen2 Smart Ring waterproof?

Yes, it is water-resistant up to 100 meters, making it suitable for daily wear, workouts, and swimming.

Note - We can not guarantee that the information on this page is 100% correct. Some content may have been generated with the assistance of AI tools like ChatGPT.

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Rishabh Sinha
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