The Mayissi Smart Ring is a screenless health wearable that sits on your finger instead of your wrist. A small sensor array is set into the inside of the closed band, resting against the skin, and it reads pulse, blood oxygen, skin temperature and movement through the day and night. The companion app for iOS and Android turns those readings into a running picture of sleep, stress and recovery. Nothing on the ring lights up or vibrates at you — you look when you want to, not when the device decides to interrupt. Made for women's health, worn by anyone Alongside sleep stages, heart rate and daily activity, this model keeps a record of skin temperature and cycle patterns. The women's features are optional — switch them on in the app when you want them, and the ring works as a straightforward sleep and activity tracker for anyone who would rather leave them off. What it replaces Most people come to a ring because something else stopped working for them: a watch that has to come off at night, a strap that slides during a run, a band that runs flat on a long trip. A ring has no screen to scratch and no strap to adjust, so the data keeps running through the hours that matter most. It is a smart ring sleep tracker you put on once and then stop thinking about. How it fits into a day Wake up, glance at the night's sleep stages over breakfast, then leave it on through work, workouts and everything in between. Data syncs over Bluetooth when your phone is nearby and the ring keeps recording in between. It is the sort of wearable that only asks for attention when you go looking for it — and on the hand it reads as a piece of jewellery rather than a gadget. A few functions sit outside the health tracking and exist purely to save you reaching for your phone. Ring finder. When the ring slips off on the sofa or gets left on a bathroom shelf, the ring finder in the app helps you work out where it was last in range — useful ten minutes before you are due to leave the house. Remote shutter. Pair the ring to your phone camera and use it as a remote shutter. Prop the phone on a ledge, step back and tap, which is far less fiddly than a self-timer and genuinely handy for group photos. Gesture control and games. Simple gestures handle a few basic interactions without unlocking the phone, and the app includes small games that use the ring's motion sensing — the kind of thing you try once out of curiosity and then return to on a long train ride. Overnight. This is where most people get their value. The ring records sleep stages, interruptions and skin temperature while you sleep, and the summary is waiting when you pick up your phone in the morning — no watch to charge, no strap to loosen at two in the morning. A working day. No screen, no buzz, nothing tapping against a desk. In an open-plan office or a client meeting it reads as a plain band, which is exactly the point. Training. Log a run, a ride or a gym session under a sport mode and it stays separate from your daily totals, so the effort shows up in your recovery numbers the next morning instead of quietly inflating your step count. In the water. Laps, a shower after a workout, a rainy run — the ring stays on and keeps recording, and a rinse afterwards keeps the sensor window clear. Travel. A week away does not need a charger in the wash bag, and a smart ring health tracker that runs flat on day three is no use to anyone. Across a cycle. Worn over a few months, a ring to track health starts to show how temperature, resting heart rate and sleep shift together — something a single night's data can never tell you. 1. Take the ring off and rinse it with lukewarm water after a swim, a workout or a hot day, before sweat, salt or chlorine has a chance to dry on the sensor window. 2. For a deeper clean, work a drop of mild hand soap around the band and across the inner sensor face with a fingertip, then rinse again. 3. Dry it with a soft cloth, starting with the charging contacts — water left on the contacts is the usual reason a charger refuses to connect. 4. Let it sit off your finger until it is completely dry before it goes back on the charger. 5. Take it off for saunas, steam rooms, heavy lifting and anything that drags across the band. 6. Store it in the charging case on a dry shelf, away from radiators and direct sun, when it is not being worn. 7. Check the fit every few weeks. A ring that has loosened still looks right on the hand, but the readings get patchy.
Sleep, measured across the night
The ring samples continuously while you sleep, and the app separates the night into deep, light and REM stages so you can see not just how long you were in bed but how the night was actually built. It flags where sleep was interrupted, learns the window in which you tend to fall asleep most easily, and over a week or two starts suggesting a bedtime that matches your own pattern rather than a generic eight hours. The sleep algorithms were developed with academic and hospital research partners, and because the ring is light and there is no strap to tangle, multi-night tracking is realistic — a smart ring sleep tracker is only useful if you actually keep wearing it.
Heart rate, HRV, blood oxygen and stress
Through the day the ring logs heart rate and heart rate variability, the beat-to-beat variation that tends to fall when the body is under load, plus blood oxygen saturation and a stress reading built from those same signals. Together they give you a sense of whether you are recovering or running hot. The app rolls them into daily and weekly scores, and can flag when something drifts outside your usual range, so you are not staring at four numbers and guessing.
Guided breathing and meditation
Five guided meditation modes are built in, aimed at stress relief, sleep and focus. During a session the ring feeds your live heart rate back to the screen so you can watch your breathing slow down, which makes the practice easier to keep up than a timer alone.
Activity and sport
Steps, distance and calorie estimates run all day, and multi-sport modes let you record a session separately so it does not melt into your daily totals. This is the part that makes it a practical smart ring health tracker rather than a sleep-only device.
Circadian rhythm and updates
The app reads sleep and activity together to work out whether you lean towards mornings or evenings, then adapts its suggestions to that rhythm. New features arrive through over-the-air updates, so the ring you own keeps improving without a hardware swap.
It is worth being precise about what you are buying. The Mayissi Smart Ring is a consumer wellness device, not a medical instrument. There is no ECG channel, no blood-pressure cuff and no screening for sleep apnoea, and it cannot diagnose, treat or monitor a medical condition. What it does is record your own patterns closely enough that changes become visible — and that distinction is the honest one, so you know exactly what the numbers on your phone are for. Where the readings sit Blood oxygen is an optical estimate taken at the finger, not the clinical oximetry used in a hospital. Skin temperature is a night-time trend that shows you when you have moved away from your own baseline; it is not a thermometer reading and it will not tell you whether you have a fever. Sleep stages are estimates built from movement, pulse and variability rather than brainwave recordings, so a single night means very little and two or three weeks of nights means a great deal. The daily and weekly scores are there to show drift from your normal range, not to name a condition. Cycle reminders are a planning aid The women's health features predict from the history you log, so they get more useful the longer you wear the ring. They are not a contraceptive method, not a pregnancy test and not a diagnosis of any hormonal condition. When to take it further If the app shows a sustained change, or you simply feel unwell, speak to a clinician. The trend view can be a useful thing to bring to that conversation, but it is not a medical record and it does not replace a sleep study, a blood test or an examination. Getting the most reliable numbers Accuracy depends on steady skin contact: keep the ring on the same finger, keep the inner sensor window clean, and check the fit if the readings start looking patchy. If you need clinical-grade monitoring or an ECG, this smart ring health tracker is the wrong tool — and we would rather tell you that now than have you rely on it for something it was never built to do.
| Property | Value |
|---|---|
| Profile | Ultra-thin closed band |
| Weight | Approximately 2.5 g |
| Exterior finish | Brushed silver |
| Inner surface | Smooth, sits flat against the skin |
| Charging | Magnetic |
| Full charge time | About 1.5 hours |
| Battery per charge | Up to 5–7 days |
| Standby time | Up to 15 days |
| Charging case | Extends total use beyond 150 days |
| Overnight wear | Designed to be worn while sleeping |
Two things are worth settling before you order: the size and the phone. On the phone, the app needs iOS or Android with Bluetooth. If you are buying a ring to track health for someone else — a partner, a parent — check which phone they use first, and place each ring as a separate line so every one gets its own size. Delivery options, shipping cost, any duties and the estimated arrival window are confirmed at checkout for your destination, and the amount shown there is the figure you pay. If you need the ring by a particular date, tell us before the order goes out and we will confirm what is realistic for your address. If anything about the fit, the app or the readings is unclear once the ring arrives, contact our support team and we will walk you through it. - No subscription to carry: buy the ring once and the companion app opens in full, with sleep stages, heart rate variability, blood oxygen, stress readings and cycle logging all included. There is no tier above the one you get. - A health tracking ring that learns your own baseline: readings are compared against your history rather than a population average, so the trend line tells you more than any single night. - Women's health built in, not bolted on: skin temperature and cycle patterns sit in the same place as sleep and stress, which is what makes this work as a women's health tracker rather than a fitness ring with an extra icon. - Light enough to forget: the band is thin and the ring disappears on the hand within a day, which is the only reason overnight tracking ever survives past the first week. - Nothing to take off: no strap to loosen, no screen to tap, no notifications knocking against a desk. It goes from bed to meeting to gym without a second thought. - One app across both platforms: iOS and Android get the same app and the same features, and updates arrive over the air rather than through a new purchase.
Mayissi is the smart-ring brand of Tide Forge Tech, a health-monitoring technology company based in Shenzhen High-Tech Park (Nanshan), China, established in 2026. Our team of ten designs, develops and builds wearable health-tracking devices that are sold to customers worldwide. Because research, design and production sit under one roof, we can watch quality at every stage, from sensor performance to the finish you wear. Every customer receives clear setup guidance and responsive after-sales support, with our team reachable around the clock.
