CYKI is the sneaker portfolio tracker for collectors — catalog your pairs, track live resale value and P&L.
Catalog every pair you own and see what it's worth — then watch how your collection stacks up against the market, updated daily. Powered by an independent daily index for the sneaker resale market — not run by a marketplace.
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Find a pair and rack it in under 30 seconds — cataloged, priced, and charted against the live market. No spreadsheets, no friction.



Every constituent priced, charted, and weighted — so you can see where the whole market sits, not just one pair. It's independent — not run by a marketplace. We update it daily and publish the method.
Pick your basket, take on the CYKI 100, and see who's still up when the market's down. New season every month.
In a down market, beating it is the flex worth sharing.
Cost-basis P/L on every pair. The home StockX walked away from.
Spot your standout holdings, your movers, and the drops worth watching — tuned to what's already in your collection.
The biggest marketplace built collection tracking — then shut it down to chase transactions. We built the home for what you hold.