Thu. Jul 31st, 2025

Circular Unleashes “Immunity Index” To Help You Stay Ahead Of Sickness


Ever wish you could know you’re about to get sick before the sniffles or fatigue set in? Wearable tech company Circular is making that a reality with its latest feature update: the Immunity Index. This cutting-edge tool, built right into the Circular app, aims to shift personal health monitoring from reactive to proactive, empowering users to understand and boost their immune resilience.

How Does It Work?

The Immunity Index is designed to detect early signs of immune vulnerability by continuously analysing your key biometric signals. Every day, the Circular app crunches data from your Heart Rate Variability (HRV), Resting Heart Rate, Sleep Breathing Regularity, and Temperature Stability.

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By constantly scanning for subtle shifts in these vital metrics, the Index delivers a simple, colour-coded score on an intuitive 8-point scale. This makes it incredibly easy to grasp your body’s readiness to fend off illness at a glance.

“With the Immunity Index, we’re shifting the health conversation from reactive to proactive,” says Amaury Kosman, CEO and co-founder of Circular. “Our goal is to empower people with real-time insights so they can take small, smart actions before minor fatigue turns into full-blown sickness.”

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Your Immunity Score Explained:

Here’s a quick breakdown of what your daily Immunity Index score means:

  • 8/8 – All Clear: Your vitals are in an optimal range—keep doing what you’re doing!
  • 6/8 – Slightly Vulnerable: One metric is a bit off—it’s a good time to prioritise rest and hydration.
  • 4/8 – Vulnerable: Fatigue or strain has been detected—time to give your body a break.
  • 2/8 – Advanced Risk: Multiple warning signs are present—your immunity might be compromised.
  • 0/8 – Major Risk: Immediate action is recommended to help you avoid getting sick.

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Each daily card in the app also includes personalised recommendations based on your score and a handy “Log Symptoms” feature. This allows you to track how you feel over time, helping you stay one step ahead of potential health setbacks.

Availability

The Immunity Index will be live on 30th July for all current Circular Ring users via the latest app update. New customers of the Circular Ring 2 will have access to the feature upon setup.

Smart rings are quickly becoming one of the most popular wearable devices for personal health and wellness monitoring. Circular’s recent pre-sale campaign for its Circular Ring 2 garnered over 13,000 orders from consumers eager to proactively monitor their vitals from their finger. If you’re looking to jump on board, late ordering is still open via the campaign page.

What are your thoughts on proactive health monitoring? Do you think the Immunity Index could change how you approach your well-being?


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