Sharp Titanium Smart Ring: 4 Sensors, 14-Day Battery Life

Sharp’s New Ring Challenges Oura

Sharp is giving the new Oura Ring 5 a run for its money, as the new Karada Mate Ring not only largely does away with paid subscription’s but also promises a longer battery life of up to 14 days with normal use, so users can skip monthly fees while still getting good health data, and it’s a big deal for people who hate paying extra after buying the hardware itself.

Design and Sensor Suite Details

The ring features a titanium case that weighs between 2.1 and 3.1 grams depending on size and is water-resistant up to 10 ATM, allowing it to be worn even while swimming without any worries, and a Duratect coating is designed to make the surface particularly scratch-resistant, so it stays looking new longer. The ring has a total of four sensors: an accelerometer, a heart rate sensor, an SpO2 sensor, and a skin temperature sensor, which lets the Karada Mate Ring to track steps taken and calories burned, plus it supports sleep phase tracking for better rest insights.

Subscription and Compatibility Features

While all these features can be used without a subscription, the accompanying smartphone app offers a nutrition tracking feature for ¥600 per month, which allows users to scan food with their smartphone camera and record its nutritional values, so it’s optional but helpful for diet monitoring, and the ring connects via Bluetooth 5.0, working with both Apple iPhones and Android smart phones without extra fuss.

Launch and Pricing Information

The Sharp Karada Mate Ring will be available in Japan starting July 9, 2026, for ¥44,800 in US ring sizes 4 through 13, so it’s priced competively against other smart rings, and Sharp has not yet commented on availability in the rest of the world, but platforms like ZenMarket make direct import from Japan straightforward if you want to get it early.