Launched a self-serve web app template for group-activity businesses
A single-file web app for sign-ups, subscriptions, session booking, a shop, and a full admin dashboard - built for any recurring-activity business.
Context: this started as a real system I was building for a specific club, then I realized the whole thing was generic enough - sign-ups, subscriptions, session booking, a shop, admin dashboard - to be useful for any recurring-activity business: fitness studios, hobby clubs, leagues.
I packaged it as a single-file HTML template, translated everything to English, and made it work fully standalone: a small LocalDB shim implements the same interface as a real Firestore-style client (collection/doc/onSnapshot/orderBy) backed by localStorage, so you can open the file and every feature just works, no server needed. Swap the shim for a real backend later and nothing else in the app changes.
Live demo: https://claude.ai/artifact/1NzvyGFAKa1tC14pVUYeNd
Get it: https://arielshimmer6.gumroad.com/l/jtiei
Would love feedback from anyone who's sold code templates before - pricing, positioning, where you found your first buyers.
