Piano Potato R16 Ultra-thin Sleep & Fitness Tracker Smart Ring: 24/7 heart rate monitor
Meet the Ultra-thin Sleep & Fitness Tracker Smart Ring – your new favorite piece of jewelry that just happens to be a health guru. Whether you're a woman or a man, this sleek, waterproof buddy slips onto your finger so comfortably, you'll forget it's there (until it reminds you to move, that is).
What's in it for you? Well, imagine having a personal health assistant that never takes a day off. It keeps an eye on your heart rate around the clock, counts every step (even those late-night fridge raids), and tells you exactly how many calories you've burned. And when it's time to hit the hay, it doesn't just count sheep – it analyzes your sleep like a pro, breaking down deep sleep, light sleep, and those annoying midnight wake-ups.
Ladies, it's got your back (or rather, your cycle) with women's health tracking for periods and ovulation predictions. And yes, it plays nice with both iOS and Android, because who has time for compatibility drama?
With a battery that lasts longer than your last Netflix binge and wireless charging that's as easy as dropping it on a pad, this ring is the gift that keeps on giving. Perfect for any occasion – or just because you deserve it.
- Step counter and calorie pedometer
- Precision sleep monitoring
- Women's health tracking
- No subscription required
- 24/7 heart rate monitor
General specs
- Brand: Piano Potato
- Model: R16
- Seller: Amazon
- package_dimensions: 2.9 x 2.9 x 1.2 inches
- item_weight: 3.52 ounces
- country_of_origin: China
- waterproof: Yes
- battery_life: Up to 7 days
- First listed by seller: 6/6/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Video Reviews
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| Brand | Piano Potato | Piano Potato | Piano Potato | Delcast | TY little store | TY little store |
| Model | R16 | R16 | R16 | |||
| Color | ||||||
| Rating |
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| Price | $79.98 | $79.98 | $79.98 | $55.99 | $59.98 | $59.98 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | June 27, 2025 | June 29, 2025 | June 27, 2025 | July 20, 2025 | August 5, 2025 | June 27, 2025 |
| package_dimensions | 2.9 x 2.9 x 1.2 inches | 3.58 x 3.54 x 1.85 inches | 3.58 x 3.5 x 1.85 inches | 3.58 x 3.5 x 1.85 inches | 3 x 3 x 2 inches | 3 x 3 x 2 inches |
| item_weight | 3.52 ounces | 4.2 ounces | 4.6 ounces | 4.2 ounces | 3.85 Ounces | 3.85 Ounces |
| country_of_origin | China | China | China | China | China | |
| date_first_available | April 1, 2025 | April 1, 2025 | January 22, 2025 | January 24, 2025 | ||
| batteries | 1 AA batteries required | 1 9V batteries required. (included) | 1 9V batteries required. (included) | |||
Ultra-thin Sleep & Fitness Tracker Smart Ring
Christopher W.
Dallas, TX
June 10, 2025
As a guy in his late fifties trying to stay on top of my fitness, I gave this ring a shot after hearing good things. I've been using it for a couple of months now, and it's been a mixed bag. On the positive side, it's slim and lightweight, so I hardly notice it on my finger, even during workouts or while sleeping. It does a decent job counting my steps and monitoring my heart rate throughout the day, which helps me keep tabs on my activity levels. The battery life is impressive—I only need to charge it every few days, and just placing it on the charger is hassle-free. However, I'm quite skeptical about the sleep tracking; it claims to analyze deep and light sleep, but it often doesn't catch when I'm awake in the middle of the night, making the data feel unreliable. Syncing with my smartphone isn't always smooth, and I've had moments where it didn't update properly, which is annoying when I'm trying to review my progress. For the price, I expected better accuracy, especially since I'm detail-oriented. It's not a total bust, but it falls short of being perfect for my needs.
- Pros: This is a game changer for keeping an eye on my daily activity without much fuss. It's quite comfortable to wear all day and night, and I like that it tracks my heart rate and steps accurately. The battery lasts a long time, and charging it wirelessly is simple.
- Cons: Most likely, the sleep analysis isn't as detailed as I hoped—it often misses when I wake up at night. It can be a bit finicky with syncing to my phone, and the predictions for health cycles seem off, which is frustrating for a perfectionist like me.