Antinodal measures a listening room and tells its owner exactly what to add — the material, the size and the spot on the wall. Beside that job, it lists the shops that sell the ready-made version.
Every recommendation in the app is complete without a shop: we tell people how to build the panel themselves, and we never change the advice for anyone. That is why a listing next to it is trusted rather than skipped.
Listings are grouped by what the room needs — broadband absorbers, bass traps, diffusers — and shown first to people you actually ship to. If a link pays a commission, the app says so beside it.
Thank you — we'll be in touch.