Barely There. Fully Aware.
Equilibrium is a slim smart watch for people who find most of them too thick to live with. At a listed 7.5mm and 45 grams, Equilibrium combines a slim metal body with a curved 1.96-inch AMOLED, Bluetooth calling and heart-rate, SpO₂, sleep, activity and cuffless blood-pressure trend features.
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A lightweight smartwatch designed for day and night wear, with a curved display, Bluetooth calls and everyday fitness and wellness trends.
A 368×448 high-resolution curved display with 2.5D glass and an ultra-wide viewing angle — fluid, bright and pleasing to touch.
A listed 7.5mm profile and 45g weight make Equilibrium comfortable for everyday and overnight wear.
Review continuous heart-rate patterns and on-demand SpO₂ estimates for general wellness awareness.
Compare estimated sleep duration and deep, light and REM stage patterns in the companion app.
Answer and make calls from the watch itself — speaker and microphone are built into the slim metal case.
Just 7.5mm thin and 45 grams with a rotating crown — a watch you forget you are wearing.

The rounded metal body is listed at 7.5mm and 45 grams, giving Equilibrium a low-profile fit for work, activity and overnight sleep tracking. Explore more styles in the REXQU collection of women's smartwatches.
Select from multiple movement modes, including running, cycling and rope skipping, and review supported workout and heart-rate data in the companion app.


Review continuous heart-rate patterns and take on-demand SpO₂ estimates from a slim health smartwatch designed for general wellness and fitness awareness.
For wellness awareness and conversations with your physician — not a replacement for a medical device.

Take an on-demand cuffless estimate and compare personal trends in the app. Equilibrium is also included in the REXQU range of blood pressure smartwatches.
Use a validated upper-arm cuff when an accurate blood-pressure reading matters.
Wear Equilibrium overnight to estimate sleep duration and deep, light and REM stage patterns, then compare nights in the companion app.


When a compatible phone is connected and within Bluetooth range, the built-in speaker and microphone let you answer and control calls from the watch.

The curved 1.96-inch AMOLED at 368×448 meets 2.5D glass for an interface that feels fluid under your finger — with an ultra-wide viewing angle from any tilt.
| REXQU Equilibrium | Big-Brand Smartwatch | Basic Fitness Band | |
|---|---|---|---|
| Curved 1.96″ AMOLED (368×448) | ✓ 2.5D glass | ✓ | ✗ Small LCD |
| Case thinness / weight | 7.5mm · 45g | 11–14mm | — |
| Estimated sleep monitoring | ✓ Included | Varies | Varies |
| 24/7 heart rate | ✓ Continuous | ✓ | ✓ Basic |
| Sleep staging (deep/light/REM) | ✓ Included | ✓ | ✓ Basic |
| Bluetooth calls (speaker + mic) | ✓ Included | ✓ | ✗ |
| Rotating crown control | ✓ Included | ✓ | ✗ |
| Metal case | ✓ Included | Extra-cost models | ✗ |
| Subscription required | No monthly fee | Varies | Varies |
| Blood pressure | ✓ Cuff-free readings | Some models | ✗ |
| Blood oxygen (SpO₂) | ✓ On demand | Some models | ✗ |
| AI voice assistant | ✓ Included | Some models | ✗ |
| Price | $129.97 | Varies | Varies |
“I stopped noticing it by lunchtime the first day. The sleep report I showed my doctor — that, he noticed.”
“The sleep breakdown finally explained my 3pm crashes. Light sleep all night. Fixed my caffeine, fixed my nights.”
“So thin it fits under my dress shirt cuff. Takes calls while I cook. My old watch felt like a brick after this.”
Every order is covered by our 30-day money-back guarantee — with free tracked shipping and easy returns. Love it, or send it back. No questions, no fuss.
Silicone in Black, Gray or Brown, a two-tone Black Gold, or steel bracelets in Black and Silver — same slim engine in all six.

Customizable watch faces from elegant chronographs to playful digital layouts — switch styles right on the curved screen.
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1000W GaN technology · 10 ports · charge laptops, phones, tablets and more simultaneously. Ships with your order.
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A receipt is on its way to your email. Your Equilibrium ships within 24–48 hours.
Wear the Equilibrium day and night for a full month — meetings, workouts, sleep. If it hasn’t earned its 45 grams, send it back for a complete refund. No restocking fee, no fuss.
Thinness is a real engineering trade rather than a styling choice. Here is what moves in each direction.
At a listed 7.5mm and 45 grams, Equilibrium slides under a shirt cuff and is comfortable enough to sleep in. That matters more than it sounds: resting heart rate and sleep are collected overnight, so a watch you keep on gives you a fuller record than a thicker one you take off at bedtime.
Thin cases hold smaller cells. There is no way around the physics, so a slim watch will generally need charging more often than a chunky outdoor one. If weeks between charges is your priority, a thicker model is the right answer — see what actually drains a watch.
A 1.96-inch panel curved to follow your wrist keeps more of the screen facing you at a glance, and the edges catch less glare than a flat panel of the same size. It is also why the watch looks smaller than its screen size suggests.
A slim case sits flat, which helps, but the strap does the real work. Snug, a finger width above the wrist bone, dry skin. The American Heart Association target heart rate guide covers what to do with the numbers once they are reliable.
SpO2 is an optical estimate that moves with fit, motion and circulation, and sleep stages are inferred from movement and heart rate rather than measured. Both are useful against your own baseline. The National Heart, Lung, and Blood Institute covers why total sleep matters more than the stage breakdown. See also watches for smaller wrists.
More from the range: all health smartwatches · everyday style smartwatches · choosing an everyday watch · fitness bands and trackers. Health statements follow our editorial and research standards.
Usually, yes, and it is worth being upfront about. A thinner case physically holds a smaller battery, so a slim watch tends to need charging more often than a bulky outdoor model. What you get back is a watch comfortable enough to wear overnight and under a shirt cuff — which is how you collect resting heart rate and sleep data in the first place. Pick the trade that matches how you will actually wear it.
Anything under about 10mm reads as slim on a wrist, and under 8mm is genuinely thin — Equilibrium is listed at 7.5mm. The number that matters almost as much is weight: at 45 grams a watch is light enough that most people stop noticing it, which is the real test. A thin but heavy watch still feels present all day.
Equilibrium pairs with compatible Android phones and iPhones through Bluetooth and uses a free companion app for supported trends and settings.
No. The companion app and the watch's listed calling, activity and wellness-tracking features do not require a monthly subscription.
The Equilibrium metal watch body is listed at 7.5mm thick and 45 grams, making it a slim, lightweight option for day and night wear.
Equilibrium has a curved 1.96-inch AMOLED display with 2.5D glass and a listed 368 by 448 resolution.
Yes. It provides continuous heart-rate trends and on-demand SpO₂ estimates for general wellness and fitness awareness.
No. Equilibrium provides cuffless blood-pressure estimates for personal wellness trend tracking. Use a validated upper-arm cuff when an accurate reading matters.
Yes. When worn overnight, Equilibrium estimates sleep duration and stage patterns for comparison in the companion app.
No. Calling uses Bluetooth, so a compatible paired phone must remain within range. The watch's built-in speaker and microphone handle the conversation.
Equilibrium includes multiple movement modes and records supported workout, heart-rate and everyday activity data in the companion app.
The page lists Black, Gray and Brown silicone options, Black Gold, and Black and Silver steel-bracelet styles. The core watch features are the same across all six.
Equilibrium orders are covered by a 30-day return window. Review the REXQU returns policy for the current terms and instructions.
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