Your shelf, decoded.

Photograph your fragrance collection once. Scent Stack identifies every bottle, maps what you actually own against the fragrance wheel, builds layering combinations from bottles already on your shelf, and names the one gap worth filling.

• The layering logic is deterministic. Combinations come from an accord-affinity matrix, not a language model guessing — the same shelf always gives the same answer.
• Your collection stays on your phone. No account, no sign-up.
• One universal set of attributes. Fragrance notes aren't gendered, so nothing here is measured differently depending on who a bottle was marketed to.