---
product_id: 660215837
title: "ULTRAHUMAN Ring AIR - Smart Ring | No App Subscription Fee | Size First with Sizing Kit | Sleep, Activity & Heart Rate Tracking | Fitness Ring for Men & Women"
brand: "ultrahuman"
price: "FREE"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.ie/products/660215837-ultrahuman-ring-air-smart-ring-no-app-subscription-fee-size
store_origin: IE
region: Ireland
---

# 24+ hrs wear test for perfect fit Optimized finger placement for accuracy 10 custom sizes (5-14) ULTRAHUMAN Ring AIR - Smart Ring | No App Subscription Fee | Size First with Sizing Kit | Sleep, Activity & Heart Rate Tracking | Fitness Ring for Men & Women

**Brand:** ultrahuman
**Price:** FREE
**Availability:** ❌ Out of Stock

## Summary

> 📏 Find your perfect fit, wear your wellness.

## Quick Answers

- **What is this?** ULTRAHUMAN Ring AIR - Smart Ring | No App Subscription Fee | Size First with Sizing Kit | Sleep, Activity & Heart Rate Tracking | Fitness Ring for Men & Women by ultrahuman
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/660215837-ultrahuman-ring-air-smart-ring-no-app-subscription-fee-size)

## Best For

- ultrahuman enthusiasts

## Why This Product

- Trusted ultrahuman brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Wear It Your Way:** Recommended on index, middle, or ring finger for optimal comfort and advanced sleep tracking.
- • **Smart Recovery Insights:** Unlock your body's recovery score by tracking HRV and skin temperature for smarter wellness decisions.
- • **Precision Fit, No Guesswork:** Use the sizing kit overnight to nail your perfect Ultrahuman Ring AIR size before buying.
- • **Tailored Comfort for 24/7 Wear:** Designed for all-day and night comfort with a notch-less, ultra-thin profile weighing just 2.4g.
- • **Workout Mode for Peak Performance:** Track heart rate and intensity across multiple sports to elevate your fitness game.

## Overview

The Ultrahuman Ring Sizing Kit helps you select the ideal size (5-14) for the Ultrahuman Ring AIR, a sleek, ultra-light (2.4g) smart ring designed for continuous health tracking. By wearing the sizing ring for 24+ hours, users ensure a precise fit that maximizes comfort and accuracy in monitoring sleep, heart rate, HRV, skin temperature, and workout metrics.

## Description

Product description Ultrahuman Ring AIR is the most comprehensive smart ring health tracker available — a health tracker, sleep tracker, fitness tracker, and stress monitor in one lightweight titanium band with no app fee for core features. This smart ring tracks 100+ metrics from your fingertip with research-grade accuracy. The built-in heart rate monitor captures HR, HRV, blood oxygen (SpO2), and skin temperature continuously, delivering a recovery score each morning. As a sleep tracker ring, it analyses REM, Deep, Light Sleep, and Wakefulness stages with actionable nudges to improve rest quality. Smart Alarm wakes you at your lightest sleep phase. The Ring AIR is a powerful fitness tracker ring, step tracker, and activity tracker — monitoring steps, calories, and METs across 20+ workout modes. The Movement Index encourages daily activity for better cardiovascular health. What makes Ultrahuman unique is PowerPlugs — the world's first modular plug-in ecosystem on a smart ring. Free PowerPlugs include Vitamin D tracking (ideal for Canadian winters), Caffeine Window for optimal energy timing, Circadian Alignment, Social Jetlag monitoring, Shift Work support, and New Parent mode. Designed as a smart ring for women and a smart ring for men. Women's Health features include free ovulation tracking, menstrual cycle prediction, pregnancy monitoring, and a 7-day fertile window — using real biomarkers, not calendar estimates. Forged from space-grade titanium at just 2.4g — the lightest smart ring available. Waterproof to 100m for swimming, skiing, and everyday Canadian adventures. Compatible with iOS and Android. Available in 15+ languages including French. Buy the Sizing Kit first — Ultrahuman Ring sizes differ from standard sizes. Available in 10 sizes (5–14) and six colours. Manufacturer Contact Information ULTRAHUMAN HEALTHCARE PVT LTD No. 2, Sy.No. 49/1 & 49/3 Am industrial area Bangalore-560068

Review: Great idea to get your correct size because of the big investment you;re making - I think the whole idea of the “Air” finger ring and sizing first is the right thing to do. You pick your normal size or one that feels most comfortable for you all day and throughout the night. This way it will give you a true feel for the correct size ring. This is a huge investment and quite honestly I was very impressed when I saw what was sent and how. As you will see from my photos, the ring sizers show on the indicator card enclosed on top that there are several finishes, and then underneath in the box itself are the prototype rings, with a spot inside each one where the part of the ring goes out a bit to mimic what the actual ring would be like. All the finishes all look to be scratch resistance, the color choices are very nice and they also have silicone covers to help preserve the rings, yet not interfere with the accuracy, heart rate information and the over all integrity of the functionality of the rings information itself. I have three things I have some issues with not with the item but for what these are preparing you for. Even though they offer 5 finishes in a large array of sizes as I said with the silicone covers if needed, they don’t have an actual color such as a light pink that for myself as a woman I would love. Also, I guess this is my biggest issue, with NYState take, a ring in my size which is second to smallest at a 6 women’s, I would be paying almost $400. I know you say well for your health it’s worth it but quite honestly, I have a pacemaker for my heart and an iOS watch that also tracks this same information. But for me I happen to think after suffering 2 heart attacks already, this is important. I will follow up when I can find out if I pay this whole amount of my insurance will reimburse me for part if not all. I have Medicare and an insurance from my husband also. Over all I did feel this deserved a 5 star review because I was even nicer than expected.
Review: Leider enttäuscht - Gute Qualität, aber einige Funktionen nur über Abo!!! In den Beschreibung steht eindeutig keine Abos. Das ist Betrug am Kunden. Blutsauersoff ist bewusst durch firmware deaktiviert, wegen Akkulaufteit. Aktivieren nicht möglich. Also wer seien Atmung im Schlaf überwachen möchte und die Sauerstoffsättigung über Nacht wissen möchte, der hat so wie ich den Ring umsonst gekauft. Schade. Wer gerne Lebenstipps zum Thema Schlaf, Ernährung, Bewegung haben möchte der ist gut beraten.

## Features

- YOUR ALL-IN-ONE SMART RING — 100+ HEALTH METRICS, NO APP FEE: Monitor heart rate, HRV, blood oxygen (SpO2), skin temperature, stress, and recovery from a single 2.4g titanium ring — the lightest smart ring available. Every core feature is free in the Ultrahuman app. No hidden fees. Compatible with iOS and Android.
- ADVANCED SLEEP & RECOVERY TRACKER: Detailed insights into every sleep stage — REM, Deep, Light, Wakefulness. Track accumulated sleep debt and skin temperature trends. Smart Alarm wakes you at your lightest phase. Daily recovery score with actionable nudges. Clinically validated sensors.
- SMART RING FOR WOMEN — CYCLE, FERTILITY & PREGNANCY: Track ovulation, menstrual cycles, and pregnancy with biomarker precision — not calendar estimates. Predict a 7-day fertile window across all 4 phases. Free Cycle & Ovulation tracking; Pregnancy Insights included. Discreet ring design that looks like jewellery.
- POWERPLUGS — THE WORLD'S FIRST SMART RING ECOSYSTEM: Free tools: Vitamin D tracking (essential for Canadian winters), Caffeine Window, Circadian Alignment, Shift Work support, New Parent mode, Screentime management. Premium add-on: AFib Detection with nightly medical-grade heart rhythm reports.
- SPACE-GRADE TITANIUM, 6-DAY BATTERY, WATERPROOF 100M: Hypoallergenic, scratch-resistant titanium with wireless charging case included. Wear it swimming, skiing, or in the rain. Buy the Sizing Kit first: Ultrahuman sizes differ from standard rings. Available in 10 sizes (5–14) and multiple colours.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D8HYRS46 |
| Additional Features | Activity Tracker, Custom Activity Tracker, Heart Rate Monitor, Multisport Tracker, Sleep Monitor |
| Age Range Description | Adult |
| Band Color | black |
| Band Material Type | titanium |
| Battery Average Life | 6 days |
| Battery Capacity | 24 |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 2 Hours |
| Battery capacity | 24 |
| Best Sellers Rank | #67,420 in Sporting Goods ( See Top 100 in Sporting Goods ) #379 in Activity Trackers |
| Brand | ULTRAHUMAN |
| Built-In Media | Type C to Type C Cable, Ultrahuman Ring AIR, Wireless Charging Dock |
| Case Material Type | Titanium |
| Clasp Type | Ring |
| Closure Type | Pull On |
| Color | Matte Black |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone, Tablet, Laptop |
| Compatible Phone Models | All current smartphone models |
| Connectivity Technology | Bluetooth |
| Connectivity technology | Bluetooth |
| Customer Reviews | 4.4 out of 5 stars 1,780 Reviews |
| Display Type | Analog |
| External Testing Certification | Não aplicável |
| GPS Geotagging Functionality | No GPS |
| Global Trade Identification Number | 08906184870700 |
| Human Interface Input | Unknown |
| Item Dimensions | 17 x 15 x 7 centimeters |
| Item Weight | 2.4 Grams |
| Language | French |
| Manufacturer | Ultrahuman Healthcare Pvt Ltd |
| Manufacturer Contact Information | ULTRAHUMAN HEALTHCARE PVT LTD No. 2, Sy.No. 49/1 & 49/3 Am industrial area Bangalore-560068 |
| Memory Storage Capacity | 0.5 MB |
| Memory storage capacity | 0.5 MB |
| Metrics Measured | Heart Rate Monitor |
| Model Name | RA-AA-Size13-US |
| Model Number | Sizing Kit 3 |
| Operating System | Ultrahuman App |
| RAM Memory Installed | 0.5 MB |
| Shape | Round |
| Special features | Activity Tracker, Custom Activity Tracker, Heart Rate Monitor, Multisport Tracker, Sleep Monitor |
| Sport Type | Cycling, Fitness, Multi-Sports, Swimming, Yoga |
| Style Name | Modern |
| Supported Application | Custom Activity Tracker, Fitness Tracker, Heart Rate Monitor, Sleep Monitor, Stimulant Window Tracker |
| Target Audience | Unisex Adult |
| Warranty Description | 1 Year Manufacturer |
| Warranty Type | Limited |
| Water Resistance Depth | 1 Meters |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | IPX8 |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless communication standard | Bluetooth |

## Product Details

- **Operating system:** Ultrahuman App
- **Memory storage capacity:** 0.5 MB
- **Special features:** Activity Tracker, Custom Activity Tracker, Heart Rate Monitor, Multisport Tracker, Sleep Monitor
- **Battery capacity:** 24
- **Connectivity technology:** Bluetooth

## Images

![ULTRAHUMAN Ring AIR - Smart Ring | No App Subscription Fee | Size First with Sizing Kit | Sleep, Activity & Heart Rate Tracking | Fitness Ring for Men & Women - Image 1](https://m.media-amazon.com/images/I/71jaGrJtr-L.jpg)
![ULTRAHUMAN Ring AIR - Smart Ring | No App Subscription Fee | Size First with Sizing Kit | Sleep, Activity & Heart Rate Tracking | Fitness Ring for Men & Women - Image 2](https://m.media-amazon.com/images/I/81aDmHty4aL.jpg)
![ULTRAHUMAN Ring AIR - Smart Ring | No App Subscription Fee | Size First with Sizing Kit | Sleep, Activity & Heart Rate Tracking | Fitness Ring for Men & Women - Image 3](https://m.media-amazon.com/images/I/71M134h6HbL.jpg)
![ULTRAHUMAN Ring AIR - Smart Ring | No App Subscription Fee | Size First with Sizing Kit | Sleep, Activity & Heart Rate Tracking | Fitness Ring for Men & Women - Image 4](https://m.media-amazon.com/images/I/81yJQ7YsNEL.jpg)
![ULTRAHUMAN Ring AIR - Smart Ring | No App Subscription Fee | Size First with Sizing Kit | Sleep, Activity & Heart Rate Tracking | Fitness Ring for Men & Women - Image 5](https://m.media-amazon.com/images/I/71EZkDK5zlL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great idea to get your correct size because of the big investment you;re making
*by N***8 on 22 March 2025*

I think the whole idea of the “Air” finger ring and sizing first is the right thing to do. You pick your normal size or one that feels most comfortable for you all day and throughout the night. This way it will give you a true feel for the correct size ring. This is a huge investment and quite honestly I was very impressed when I saw what was sent and how. As you will see from my photos, the ring sizers show on the indicator card enclosed on top that there are several finishes, and then underneath in the box itself are the prototype rings, with a spot inside each one where the part of the ring goes out a bit to mimic what the actual ring would be like. All the finishes all look to be scratch resistance, the color choices are very nice and they also have silicone covers to help preserve the rings, yet not interfere with the accuracy, heart rate information and the over all integrity of the functionality of the rings information itself. I have three things I have some issues with not with the item but for what these are preparing you for. Even though they offer 5 finishes in a large array of sizes as I said with the silicone covers if needed, they don’t have an actual color such as a light pink that for myself as a woman I would love. Also, I guess this is my biggest issue, with NYState take, a ring in my size which is second to smallest at a 6 women’s, I would be paying almost $400. I know you say well for your health it’s worth it but quite honestly, I have a pacemaker for my heart and an iOS watch that also tracks this same information. But for me I happen to think after suffering 2 heart attacks already, this is important. I will follow up when I can find out if I pay this whole amount of my insurance will reimburse me for part if not all. I have Medicare and an insurance from my husband also. Over all I did feel this deserved a 5 star review because I was even nicer than expected.

### ⭐⭐⭐ Leider enttäuscht
*by T***T on 12 August 2026*

Gute Qualität, aber einige Funktionen nur über Abo!!! In den Beschreibung steht eindeutig keine Abos. Das ist Betrug am Kunden. Blutsauersoff ist bewusst durch firmware deaktiviert, wegen Akkulaufteit. Aktivieren nicht möglich. Also wer seien Atmung im Schlaf überwachen möchte und die Sauerstoffsättigung über Nacht wissen möchte, der hat so wie ich den Ring umsonst gekauft. Schade. Wer gerne Lebenstipps zum Thema Schlaf, Ernährung, Bewegung haben möchte der ist gut beraten.

### ⭐⭐⭐⭐ Great but a power hog
*by L***S on 16 May 2026*

The item looks as expected, and is generally easy to use, you just put a ring on. I’ve rated it 4 stars because to get readings with no gaps I needed to set it to turbo mode and that basically means recharging every day. That’s not an issue for me really, I can do that whilst I’m organising breakfast etc and it’s charged by the end of that, but if you’re expecting 4-5 days it’s a bit of a difference! Otherwise, it tracks HR, skin temperature, steps etc. There are plugins that are mostly free to extend functionality, and one I’ve subscribed to which monitors heart health more closely. Apart from the extra recharges, I’m very happy with it.

## Frequently Bought Together

- ULTRAHUMAN Ring AIR-Smart Ring Health Tracker, Size First Sizing Kit,Sleep Tracker,Smart Ring for Men/Women,Fitness Tracker (Made in India, Swatch Sizing Kit, Swatch Sizing Kit)
- RingConn Gen 2 Air Sizing Kit - Size First Before You Buy - Choose from 9 Sizes - Sizes 6 to 14 - Only Smart Ring
- Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase

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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-08-28*