Doni smart ring blends cardiovascular monitoring & emotion tracking

A new smart ring called Doni has just launched on Kickstarter, and it sounds interesting on paper. The device aims to bring advanced health and emotional tracking into a single device. The campaign promises deep insights into cardiovascular risks, hormone fluctuations, emotional states and more.

The rise of crowdfunding platforms has led to a steady wave of smart ring projects over the past few years. Some have delivered on their promises, while others struggled to reach production or launch with limited functionality. Probably the best ones we’ve seen so far are RingConn and Ultrahuman.

Doni is a bit different than these two.

Advanced health insights

This ring focuses heavily on cardiovascular monitoring, going beyond standard step and sleep metrics. It combines a medical-grade PPG sensor with hemodynamics modeling to track six key risks: atrial fibrillation, arrhythmia, blood viscosity, arterial stiffness, myocardial ischemia and potential heart failure indicators. Quite an ambitious list, most would agree.

The company references technology similar to wrist-based blood pressure monitoring systems, which have already secured medical device approval in China. That may not be as good as approval from the US, but it is something.

Doni also integrates heart rate, respiration, and heart rate variability data into a single “body energy score.” Lower readings signal fatigue and the need for recovery, while higher scores suggest better readiness for activity. This level of integration could appeal to users who want more detailed insights into their overall condition.

Emotional awareness and hormone insights

One of Doni’s headline features is its ability to detect emotional states without requiring manual input. Instead of logging moods like you would on some other platforms, the ring uses AI-driven analysis of PPG signals to identify seven core emotions and track hormone fluctuations. The company claims this approach can highlight stress levels, intimacy patterns, and even shifts in relationship dynamics.

Users can also choose to share their emotional and health data with trusted contacts in real time. Combined with other metrics like sleep quality and SpO₂ monitoring, Doni tries to position itself as more than just a fitness tracker.

Everyday design and usability

As far as actual design, Doni ring measures just 2mm thick and weighs between 2.5g and 3.6g. Waterproofing is rated at 10ATM, so you can wear it while swimming or diving, and the quoted battery life reaches up to 15 days on a single charge. The ring comes in Obsidian Black and Bloom finishes and charging takes about two hours using a magnetic dock.

All in all this is shaping up to be an interesting addition in the smart ring space.

Doni smart ring isn’t hitting retail shelves just yet. As mentioned, it is launching via a crowdfunding campaign which means backers are supporting a product that is still in development. While the team behind the ring highlights its advanced health-tracking capabilities, it’s worth remembering that crowdfunding always carries a degree of risk. Delivery timelines can slip, and features may change before the final version ships.

If everything goes according to plan backers should have their ring in October. Prices start at $99.

Price: $99 and up

Raised: $18,659 of $3,000 goal

Estimated delivery: October 2025
23 days to go before campaign closes

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