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Most smart rings are content to sit on your finger, count steps, and call it a day. The CUDIS Sporty Series Ring isn’t most smart rings. It’s a 3-gram aerospace titanium wearable that tracks over 30 sports, connects you to licensed health specialists, and pays cryptocurrency rewards when you hit your wellness goals. It’s also the first smart ring that lets you swap out its look with interchangeable silicone bands.
Price: $299 (Discounted from $399)
Where to Buy: Cudis
The Sporty Series is CUDIS’s second-generation ring, following the original CUDIS 002 that launched in late 2024. The company, founded by BeatBit Wellness Lab and backed by a $5 million seed round led by Tim Draper’s Draper Associates, has shipped over 26,000 rings to users across 103 countries. That’s not Oura numbers, but it’s real traction for a startup blending wearable tech with blockchain.
The original CUDIS ring came in one color and one style. The Sporty Series fixes that with six interchangeable silicone bands available in 12 colors, including jet black, lunar silver, cosmic blue, and fiery red. CUDIS says the thinking came from Apple’s 1998 iMac, which exploded in popularity partly because it gave people color choices instead of beige boxes. The idea is simple: let people match their ring to their outfit or mood, and they’ll actually want to wear it every day.
Underneath the swappable bands, the hardware hasn’t changed its core formula. The ring still weighs 3 grams, carries a 5ATM waterproof rating for pool and shower use, and lasts up to 10 days on a single wireless charge. British triple jumper Naomi Metzger, who’s training for the LA28 Games, wears one. UCLA Athletics signed a one-year partnership with CUDIS that includes NIL deals with student-athletes and on-campus activations tied to wellness and data ownership.
The ring monitors heart rate variability, sleep patterns, stress levels, and activity through the dense capillary bed in your finger, which CUDIS says provides clearer biometric signals than wrist-based trackers. A ChatGPT-powered AI coach processes that data and delivers personalized recommendations through the CUDIS app, which also integrates with Apple Health, Google Fit, Strava, and MyFitnessPal.
When the AI flags something that needs professional attention, CUDIS says the app can connect you to licensed health specialists. That’s a meaningful step beyond what most wearables offer, if it delivers. Oura and Samsung tell you something might be off. CUDIS tries to connect you with someone who can actually help.
There’s no subscription fee, either. The CUDIS app is free to use with all its tracking and AI coaching features, which sets it apart from Oura’s $6/month membership for full data access.
Here’s where CUDIS gets interesting for the Web3 crowd. The ring runs on a DePIN (decentralized physical infrastructure) model built on the Solana blockchain. Users earn cryptocurrency rewards by completing daily health quests, wearing the ring consistently, and hitting personalized milestones. The rewards come through the $CUDIS token, which launched on major exchanges including Bybit, Bitget, and MEXC in June 2025.
CUDIS estimates that health data could be worth up to $5,000 annually per user, though that figure depends heavily on token values and broader crypto market conditions. The company lets users maintain ownership of their biometric data through what it calls Longevity Decentralized Identifiers (LDIDs), with the option to mint anonymized health data as NFTs on Solana.
For users who don’t care about crypto, the ring still functions as a capable health tracker. But the blockchain layer adds a financial incentive that most competitors don’t currently offer.
The CUDIS Sporty Series Ring carries a retail price of $399, available through the CUDIS website at cudis.xyz. The company is currently offering 40% off through its Pioneer Package, which drops the price to $239 and includes free global express shipping and an extra set of silicone bands. Third-party sellers on eBay and other marketplaces carry various CUDIS models at different price points.
Price: $299 (Discounted from $399)
Where to Buy: Cudis
The CUDIS app is available on iOS and Android, with over 250,000 users onboarded to date. The company plans to expand its ecosystem through 2026 and 2027 with a Longevity Hub community, multi-agent AI system, and partnerships targeting mainstream health-conscious audiences beyond the crypto community.
