Alloop's $299 ring and band tracker has no accuracy data

Alloop has published no accuracy data for Trio, the wearable it unveiled in New York on Oct 23. Trio starts at $299 and is “Coming to Kickstarter,” per Alloop’s site on Oct 29.

Trio moves one 2.4 gram sensor, the Cube, between a smart ring and a screenless wristband. You pick where to wear it.

What we don’t know

Accuracy. Alloop’s site and its Oct 23 press release give no validation study, error rate or comparison with a medical device. The site says “Compliance and certification in progress.”

Wrist versus finger. The Cube uses PPG optical sensing, which reads blood flow through the skin with light. Alloop’s ring section says “More accurate tracking.” Alloop has posted no numbers on how the same Cube reads on a finger compared with a wrist.

Delivery. Trio is crowdfunded hardware that has not shipped. Alloop’s site lists no campaign date and no shipping date as of Oct 29.

Kickstarter requires every project page to include a “Risks and Challenges” section, a rule it added on Sep 20, 2012. Read that section before you back it.

What Alloop says Trio does

Alloop lists these specs on its product page, read Oct 29:

• The Cube weighs 2.4 grams and lasts 7 days on a charge.
• The app shows heart rate variability, resting heart rate, blood oxygen, breathing rate and temperature.
• Alloop rates the Cube 5 ATM, or 50 meters of water resistance, in the ring or the band.
• Halo is an extra module for the band. It charges the Cube while you wear it and records voice notes when you double tap it. Alloop rates Halo IP68.
• A Bio Age score combines 18 measurements across six health categories.

The core app is free, and extra AI features are optional. Alloop says no subscription is required.

Its release says the platform pulls data through Apple Health, Google Health and Health Connect. The Alloop AI app is already on the App Store and Google Play.

Who is behind it

The press release names Dr. Tony Wu as Alloop’s founder and CEO and Frank Wong as a cofounder. Alloop’s company page says its engineers have built hardware and health technology at Samsung, RingConn, OPPO, Accenture and Bosch.

HTN covers ring and wrist trackers on the same beat, including Oura’s automatic VO2 max and FDA cleared cuffless blood pressure devices.

Why it matters

Our read: a sensor that moves from finger to wrist lets one device cover sleep and training. That only works if the readings match in both places. Alloop has not shown that they do.

What’s next

Alloop has not posted its Kickstarter date. When the campaign page opens, check it for a delivery date, a final price and any validation data for the Cube.