Smart rings / Comparison

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Health-tracking smart rings sold new in the US with their included charger. Payment-only rings, NFC rings, fitness bands, smartwatches and measured accuracy, sleep or battery rankings are outside this catalogue.

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Documented specifications and exact purchase packages
Compare the details	Ultrahuman Ring PRO Aster Black, buyer-selected size (US)
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US purchase package	Ring PRO with PRO charging case; Aster Black; size 5 to 14 chosen by the buyer with I know my ring size; no trade-in; no Ultrahuman Max plan or UltrahumanX coverage Product & sources Raw Titanium, Bionic Gold and Space Silver are the other colors. Premium PowerPlugs, Ultrahuman Max and UltrahumanX are optional paid add-ons, not part of this package. Ultrahuman does not publish a part number on the pages read. Price, ship-by date and stock are not recorded. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Where to buy	Select: Ring PRO with PRO charging case; Aster Black; size 5 to 14 chosen by the buyer with I know my ring size; no trade-in; no Ultrahuman Max plan or UltrahumanX coverage View at Ultrahuman — Ultrahuman Ring PRO Aster Black, buyer-selected size (US); opens in a new tab The link may open several packages. Check current price and availability with the seller. Opens in a new tab.
Sizes and sizing kit The ring sizes the manufacturer lists for the US and how its sizing kit is offered. Smart ring sizes differ from jewelry sizes and between brands and generations. Use the maker's own sizer before choosing a size; the buyer selects the size for every package here.	Sizes 5 to 14, no half sizes. A free sizing kit option ships plastic sizers first; Ultrahuman sizes may differ slightly from standard US sizes, and Ring AIR sizes carry over. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Ring weight The published weight of the ring, with the size basis where the manufacturer states it. Weight changes with size. A single figure without a size basis is not comparable with a range.	3.3 to 4.8 g, depending on size. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Width and thickness The published band width and thickness of the ring. Thickness can vary by size. These are body measurements, not a comfort or fit guarantee.	Thickness 2.65 mm, varying by size; width not stated. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Materials and finishes The shell and inner-surface materials and the finishes listed for the US. Finishes can change the coating and the SKU. Scratch and allergy statements are manufacturer claims.	Titanium unibody with PVD coating, epoxy and polycarbonate; inner surface hypoallergenic plastic and titanium. Colors Raw Titanium, Aster Black, Bionic Gold and Space Silver. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Longest stated ring battery life The upper end of the manufacturer's battery-life claim for the ring on one charge, without a charging case. A maker estimate under its own sizes and settings, not a measured result. Read the conditions field for the size basis and the features that shorten it.	15 daysUp to 15 days, in Chill Mode. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Battery claim conditions The size basis, modes and settings behind the battery claim, including any case-assisted figure. Smaller rings usually carry smaller batteries. Days with a charging case include recharges from the case and are not a ring battery figure.	Turbo Mode about 12 days, Chill Mode more than 15 days; up to 45 days with the PRO Charging Case. Ultrahuman says results vary with usage, settings and environment and gives no size basis. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Charger and charging The charger type supplied, whether it carries its own battery, and the stated charging time. Some chargers are size-specific and some cases are not sold separately. A portable case with a battery is different from a dock that needs a cable.	PRO Charger case with its own battery and UltraSnap magnetic charging; the case charges by USB-C or 5 W Qi wireless and stores up to a year of ring data in Chill Mode. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Water rating The water resistance as the manufacturer states it, in ATM, IP or meter terms with any conditions. A 100 m figure is not a diving rating. IP68 conditions are set by the maker. Follow the stated limits for submersion, diving and heat.	Water resistant to 100 m (328 ft). Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Sensors listed The sensor hardware the manufacturer lists, or the signals it says the ring measures where no hardware is listed. A listed sensor is not a validated measurement. Which metrics appear can depend on the app, a plan or an add-on.	Temperature sensor, redesigned PPG and 6-axis IMU (accelerometer and gyroscope), covering sleep stages, heart rate, HRV, resting heart rate, SpO2, skin temperature and movement. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Blood oxygen documented Whether the manufacturer documents blood oxygen (SpO2) readings for this ring. Often measured only during sleep and sometimes off by default. It is a wellness reading unless the maker states a regulatory clearance.	YesThe FAQ lists SpO2; the explainer says overnight SpO2 comes from the Respiratory Health PowerPlug. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: How the Ultrahuman Ring worksChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Works with iPhone Whether the manufacturer states the ring's app works with iPhone, or states a requirement that excludes it. The manufacturer's compatibility statement, not a tested result. Minimum iOS versions are in the requirements field where published.	YesUltrahuman states the app is on the App Store and syncs with Apple Health; no minimum iOS version is stated. Source · 2026-10-21 Ultrahuman: How the Ultrahuman Ring worksChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Works with Android Whether the manufacturer states the ring's app works with Android phones. Some rings document only one brand of Android phone, or limit features on others. Read the requirements field.	YesUltrahuman states the app is on Google Play; no minimum Android version is stated. Source · 2026-10-21 Ultrahuman: How the Ultrahuman Ring worksChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Phone and app requirements The stated phone platforms, minimum versions, apps and accounts the ring needs. Where two manufacturer statements differ, both are recorded. An account is not a subscription, but the ring may not work without it.	Ultrahuman app from the App Store or Google Play, with Apple Health sync; minimum phone versions are not stated on the pages read. Sources · 2026-10-21 Ultrahuman: How the Ultrahuman Ring worksChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Core features without a subscription Whether the manufacturer states that the ring's core health features are available without a paid plan. False means the maker limits most insights to paid members. True can still leave optional paid add-ons, listed in the terms field.	YesNo subscription fee for ring data; core features are included. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: How the Ultrahuman Ring worksChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Subscription terms as stated What the manufacturer says works with and without a paid plan, and any optional paid add-ons. Prices are not recorded. A trial month included with a ring is not a permanent entitlement. Plans and their contents can change after purchase.	Ultrahuman states one purchase gives lifelong access to the ring and data, core features are included and most PowerPlugs are free. Premium PowerPlugs such as Cardio Adaptability and Cycle and Ovulation Pro, and an optional Ultrahuman Max plan, are paid add-ons. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: How the Ultrahuman Ring worksChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman PowerPlugsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Wellness or regulatory wording The manufacturer's own wording on whether the ring is a wellness product or holds a regulatory clearance. Quoted as published. Features such as ECG, apnea or blood pressure trends are not a diagnosis unless the maker states a clearance for that feature.	Ultrahuman: Ring PRO is not classified as a medical device and is not intended for managing, treating or preventing diseases or for diagnostic decisions. Its PowerPlugs page lists AFib Detection outside the US, with a USA launch still planned.The Ring PRO page also describes AFib Detection reports; the PowerPlugs page says that PowerPlug has not launched in the USA. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman PowerPlugsChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
In the box Items the manufacturer lists in the exact US package. Sizing kits, spare charging cases, extended protection and paid plans are separate unless the package lists them.	Ultrahuman Ring PRO, Ring PRO Charger and a 1 m Type-C to Type-C cable. Sources · 2026-10-21 Ultrahuman: Ultrahuman Ring PRO US buy pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.Ultrahuman: Ultrahuman Ring PRO FAQChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified.
Questions to check before buying	Battery claims have no stated size basis, and the PRO Charger color shown at checkout is not explained on the page. The US Ring AIR buy address redirected to Ring PRO on the check date, and AFib Detection is not listed as available in the USA.

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