Ultrahuman, the team behind the trendy Ring Air smart ring, is joining our hormones on the next level. Kicking off this week, Ring Air fans can snag the Cycle and Ovulation Pro tool through a subscription. This add-on is like having a mini-period detective on your wrist, giving you fast, personal updates whether your month is a classic 28 or something a little more unpredictable.
This rollout is a bright sign that Ultrahuman is powering up the Ring Air’s health toolkit, turning a cool gadget into a yellow-highlighter-smart wellness coach. While many trackers print a “default cycle” handbook, Cycle and Ovulation Pro dives into the nitty-gritty if your cycle shuffles around, faces PCOS, thyroid hiccups, or battles with endometriosis. No more one-size-fits-all data—this ring wears your story every day.
What Makes Cycle and Ovulation Pro Different
The upgrade starts with smart temperature sensing. Ultrahuman teamed up with viO HealthTech—the folks behind the OvuSense fertility tracker—to fine-tune the algorithm that does the heavy lifting. OvuSense spent years in labs and clinics and has the data to prove it, with over a dozen research papers backing the results. Originally, the algorithm required a nightly vaginal sensor, but Ultrahuman has turned that into a one-piece solution that fits right in the sleek Ring Air—a definite win for comfort and convenience.
When you wear the Ring Air to bed, it continuously monitors Core Body Temperature and locks in .003°C precision. That temperature reading wakes the OvuSense algorithm in the cloud, the same brain that has taken years of medical tests and learned the signs of hormonal changes. Within a few minutes, the ring relays a verified ovulation status with 99% accuracy and details for the two weeks afterward—such as the length of the luteal phase and trends that suggest ovulation didn’t occur that cycle. The insight isn’t just for anyone trying to get pregnant. The clear view of the body’s hormonal calendar helps anyone who is curious map the fingerprints of how they cycle changes from month to month.
Why This Matters
Most smartwatches and health apps now come with cycle tracking tools, but many of them dish out cookie-cutter predictions. If you deal with PCOS or other similar conditions, those guidelines can miss the mark. That’s the gap Ultrahuman wants to fill. The company believes its new cycle and ovulation feature tops 90% accuracy and backs that claim with clinical studies and over 260,000 cycles logged.
Let’s put that into perspective: the standard app might say ovulation should land on Day 14. Ultrahuman can look at your specific data and spot the differences, letting the app suggest a custom timeline. You also get to log symptoms, tagging things like cramps or mood swings, so the app can spot cycles that surprise you every month. All that makes the Ring Air the smartest smart ring now tracking reproductive health.
A Smarter Alternative to Traditional Methods

Earlier OvuSense models needed to be inserted at bedtime. That nightly chore felt annoying to plenty of users. By sneaking the same measurement power into the Ring Air, Ultrahuman keeps accuracy without the hassle. The ring marries precise sensors, clever software, and a design you actually want to wear. Ultrahuman’s created a fertility monitor that just merges into everyday life, so tracking your cycle feels as natural as checking the time.
Ultrahuman’s timing for rolling out Cycle and Ovulation Pro feels very intentional. Just days before, Oura, its biggest rival in the smart ring world, showcased cycle tracking tools that spotlighted both pregnancy planning and menopause guidance. Ultrahuman countered showing Cycle and Ovulation Pro, which tackles ovulation, menstrual and cycle irregularities. By doing this, it’s telling Oura—and all of us—it’s ready for the challenge, but targeting an audience that Oura hasn’t pushed as hard: those with unpredictable or longer, shorter cycles.
You can actually get Cycle and Ovulation Pro right now in the U.S., the U.K., Europe, Australia, and Canada. It’s $4 a month or $40 a year, which feels manageable for a lot of people. There’s a free plug-in for regular cycle tracking that stays free, but the Pro version ups the game with lab-backed accuracy and validation that basic tools can’t deliver. So for users eager for deeper, clearer, and confirmed insights, that small fee feels worth it.
Ultrahuman saying it loudly public, the wider industry is heading in this direction—wearable tech that really focuses on women’s and personal health in a smarter way. With millions dealing with conditions like PCOS, endometriosis and really unpredictable menstrual health, a tiny, non-invasive device that provides confirmed, dependable cycle insights feels like it could change everything.
After looking ahead, it’s pretty clear that Ultrahuman will stuff Cycle and Ovulation Pro with even cooler stuff: signs a miscarriage might happen, smart forecasts before fertility treatments, and maybe even talk with our doctors over a video call. Health companies are pouring money into specific extras, so the back-and-forth between Ultrahuman and Oura might keep heating up. That sort of healthy competition usually hands the rest of us sharper and more personalized tools to check our wellness.
A Look Back
This is definitely not Ultrahuman’s first swing at serious health tracking. They’ve been stacking new stuff one by one, most recently looping in glucose scores and even peeking at body fluids to find markers in the blood. Each extra feature is yelling, “Hey, we’re not just a step counter. We’ve got the science in our pocket.”
Buying viO HealthTech shot the company out of the deep end and into the shallows of proven studies and tidy, working algorithms. This debut Cycle and Ovulation Pro feature is the postcard that shows us why the deal is priceless. Put strong gear next to trusted medical reports and you end up with the new answer to the fitness wristband: a brand that’s turning into a heavyweight in digital health, not just a fun tracker.