THUMBY is an interactive, camera-based platform where users post photos of their thumbs, collect votes, and compete for developer fees. The site invites visitors to open their phone camera, take a thumb photo, and provide a wallet address for potential payouts. Uploads and screenshots are not accepted, and each submitted image is checked to confirm it shows a real thumb before appearing on the community wall.

Users can connect a Phantom wallet to vote, with each wallet receiving one vote every two minutes. Competition runs in five-minute rounds: when a round ends, the thumb with the most votes wins 100% of the developer fees, which are sent to the winner’s stated wallet. A new round then begins. The platform includes a live ranking area, a public wall of entries, and a recent-winners section. At the time described, these sections showed no entries or winners. THUMBY also provides a phone-based camera experience for desktop visitors through a scannable code.