The problem: you find a sofa on one site, a table on another, but can't tell if they'll work together. AR apps only support their own catalog. Pinterest is flat.
Diorooma lets you drop screenshots from any store, arrange them in a 3D room, and get a shopping list with prices.
Free, no signup: https://diorooma.com
Feedback welcome – especially on UX and what features would be useful.