WristFit

WristFit is a mobile AI + traditional app that helps shoppers choose the right watch size and strap fit with fewer returns. Users take two quick photos of their wrist next to a common reference (credit card) or use an on-screen calibration card they can print. The app estimates wrist circumference, suggests case diameter ranges (e.g., 38–40mm), strap length, and lug-to-lug comfort guidance, then matches those specs to real product listings via links or manual entry. It also flags “looks big/small” risk based on wrist-to-case ratio and offers a simple try-on visualization (not perfect, but directionally useful). For buyers, it reduces uncertainty; for sellers/brands, it can cut return rates and improve conversion. Monetization: affiliate links, premium sizing reports, and a lightweight B2B widget for Shopify watch stores.