The changelog
Fragrance Engine is built by one person and ships continuously. This log is the public record of it: features, fixes, and honest corrections, in plain language. The log opens in May 2026; the product predates it.
June 2026
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Jun 10
Tier cards corrected and the AI meter renamed. The pricing tier cards were rewritten to match the shipped product exactly, and AI credits are now called briefs everywhere, with the boundary stated plainly: a language model reads the brief, the deterministic engine does the rest.
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Jun 9
Features page corrected against reality. The comparison matrix was audited line by line against what is actually shipped; stale claims and a roadmap section were removed.
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Jun 7
Terms of Service and Privacy Policy published, alongside site-wide protection against cross-site request forgery on every form.
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Jun 7
Batch depletion. Recording a batch can now subtract the materials it used from your inventory lots, oldest lot first, with a live preview and a one-click undo.
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Jun 7
The formula map now follows the register's family and category filters.
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Jun 6
Build-check against your inventory. On any formula, see per material what you own, what you are short, and what you do not track, with a shopping list for the gaps. Free.
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Jun 6
Reformulate around a material you cannot get. Pick the unavailable material and the engine proposes the nearest olfactive replacement with a before-and-after of structure and performance, saved as a reversible draft. Studio.
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Jun 6
A formula composed in the landing sandbox now follows you through signup as your first saved draft.
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Jun 5
Paste or import your own formula. Paste a formula as text or CSV and get the full read-back on a private draft, with per-line catalog matching you confirm before anything is saved. Free.
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Jun 5
Material swaps gained a one-step undo, and the cost optimizer and substitutions were correctly gated to Studio after a free-access leak was found and closed.
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Jun 4
Your bench numbers beside the estimates. Studio Pro can record its own projection, longevity, and sillage readings next to the computed values, clearly badged, with the estimate kept for provenance. The same release added the standing estimate-versus-bench note across the app.
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Jun 2
The Formulary. A community library of published accord editions: browse and take editions into your workspace on any paid plan, publish your own on Studio Pro.
May 2026
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May 31
Catalog data completion. 258 of 260 live materials now carry full curated physical data, the foundation every estimate stands on.
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May 27
Roles in context. A material's top, heart, or base reading now reflects the formula it sits in, not just its catalog label, so an accent reads as an accent. The method is described on the methods page.
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Late May
Engine truth overhaul. Family-aware composition shaping (a citrus brief and an amber brief now build structurally differently), corrected fixative data across the catalog, and a rewritten internal self-check that runs before every release.
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Late May
Formula compare, the inventory library, and the dilution calculator shipped, and the lab sheet's gram math went density-aware.
Wondering whether a specific thing exists yet? The features page is the maintained answer.