Circular Ring 2 Review: Big Health Ambitions, Basic Flaws

Circular Ring 2 Review: Big Health Ambitions, Basic Flaws | PCMag

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2.0 Subpar this.$refs.template.innerHTML, onCreate: (instance) => this.tippyInstance = instance, onShow: (instance) => { this.escapeHandler = (e) => { if (e.key === 'Escape') instance.hide(); }; window.addEventListener('keydown', this.escapeHandler); }, onHide: (instance) => { if (this.escapeHandler) { window.removeEventListener('keydown', this.escapeHandler); this.escapeHandler = null; } }, onMount: (instance) => { const closeBtn = instance.popper.querySelector('[data-tooltip-close]'); if (closeBtn) closeBtn.addEventListener('click', () => instance.hide()); }, }; }, }">   What Our Ratings Mean 5.0 - Exemplary: Near perfection, ground-breaking 4.5 - Outstanding: Best in class, acts as a benchmark for measuring competitors 4.0 - Excellent: A performance, feature, or value leader in its class, with few shortfalls 3.5 - Good: Does what the product should do, and does so better than many competitors 3.0 - Average: Does what the product should do, and sits in the middle of the pack 2.5 - Fair: We have some reservations, buy with caution 2.0 - Subpar: We do not recommend, buy with extreme caution 1.5 - Poor: Do not buy this product 1.0 - Dismal: Don't even think about buying this product Read Our Editorial Mission Statement and Testing Methodologies. The Bottom Line The Circular Ring 2 packs advanced health features like ECG and AFib detection, but inconsistent accuracy and a buggy app make it hard to recommend over more reliable rivals. MSRP $349.00 $349.00 $349 at Circular PCMag editors select and review products independently. If you buy through affiliate links, we may earn commissions, which help support our testing.

Pros & Cons Long battery life Colorful, customizable app ECG readings and AFib detection Inaccurate exercise tracking Gaps in sleep data App stability and syncing issues Excessive notifications Circular Ring 2 Specs Name Value tr:nth-of-type(n+6)]:hidden" :class="{ '[&>tr:nth-of-type(n+6)]:!table-row': open }"> Display Type N/A Compatibility Android, iOS Heart Rate Monitor Sleep Tracker Battery Life 5.5 days

The $349 Circular Ring 2 introduces a couple of new features to the smart ring category, but it fumbles too many basics to be a useful fitness tracker. From your finger, this stylish titanium band can take an electrocardiogram (ECG), monitor for atrial fibrillation (AFib, or a chronic irregular heartbeat), and, in a future update, let you take blood pressure readings. However, in testing, it was slow to sync, its app crashed numerous times, and its exercise and sleep metrics were often inaccurate or absent. I’ll be keeping an eye on the ambitious Circular brand to see what it does next, but I simply can't recommend the Ring 2 in its current state. Our Editors' Choice, the $349 Oura Ring 4, delivers significantly greater accuracy and offers much better overall value.Pricing: No Subscription—At Least for NowThe Circular Ring 2 comes in black, gold, pink, or silver, with black starting at $349 and the others priced higher. Silver starts at $449, while pink and gold both cost $549. Circular doesn't charge a premium for bigger sizes within a given color. The ring comes in sizes 6 through 14, and Circular says to wear it on your non-dominant hand and on one of your three middle fingers. The company's digital sizing feature uses your phone’s camera and AI to determine the best fit for you. The tool lets you take a picture of your hand next to a standard-size card, like a driver’s license, or you can measure a ring that already fits you well using an on-screen guide. If you don’t want to use the digital sizing kit, the company offers a standard physical kit for an extra $5 on your order. Both the Oura Ring 4 and the Samsung Galaxy Ring ($399.99) come with free sizing kits. Samsung charges $10 for the kit initially, but discounts that cost if you proceed with a ring purchase. Similar Products

Our Current Picks for The Best Smart Rings for 2026 Oura Ring 4