3D scenes stored in shareable URLs
Entire 3D scenes stored in URLs—clever constraint, but limited by URL length and browser storage.

Shareable URLs encode the entire receipt so no screenshots needed in group chats.
Travelers, groups splitting bills internationally
Splitwise · Tricount · Settle Up
Entire 3D scenes stored in URLs—clever constraint, but limited by URL length and browser storage.
Stateless bracket sharing via 217-character URL encoding beats backend-dependent predictors.
Grooves live in URLs — fork, modify, resend without accounts or files.
Removes signup friction, but Splitwise, Tricount, Settle Up already dominate this niche.
Local-first finance without bank API access—but transaction import+categorization is well-solved.
Dual conversion rates for credits, but existing billing platforms already handle this.