ZzzRing, touted as the globe’s inaugural solar-powered smart ring, has secured over $20,000 in crowdfunding on Kickstarter as of May 27, 2025, with commercial availability slated for September this year.

Powered by a high-efficiency flexible perovskite solar cell and optimized with ultra-low-power design and smart energy management, ZzzRing enables seamless indoor-outdoor charging, reducing recharge frequency and enhancing user comfort. Developers claim the device achieves a full charge in 1.5 hours, delivering up to 12 hours of battery life.

The ring offers complimentary capabilities including:
- Health Tracking: Accurate monitoring of daily stress levels via heart rate analysis, with AI-generated personalized mood reports and coping strategies.
- Temperature Sensing: Multi-sensor detection of basal body temperature fluctuations to predict menstrual cycle onset and alert users to anomalies.
- Gesture Controls: Touchless photo/video switching and one-tap ChatGPT activation.
- NFC Integration: Limited to door access and data transmission.

ZzzRing distinguishes itself by combining renewable energy with health-focused AI insights, positioning it as a wearable device balancing sustainability and functionality.