Questions and answers

Is Deduvin free? Yes. No payment, no ads, no premium level.

Do I need an account? No. Your tastings are kept on your phone. If you want them on another device too, Settings gives you a twelve-character code; enter it on the other device and the two share one history. There is no email, no password and nothing that identifies you.

Do I need to know anything about wine? No. The questions use everyday words, and the reveal explains each glass in plain language. People who know wine well play it too, for the flights and for the daily mystery.

Do I need to install anything? No. Deduvin runs in the browser. If you add it to your home screen it opens from its own icon and works without a connection.

How does Deduvin know what is in the glass? It does not know; it reasons. Each of the 57 wines has a profile (two for the seven that differ by place or method) of how it usually looks, smells and tastes, built from wine textbooks and calibrated against Systembolaget's taste descriptions. Every answer you give makes some wines more likely and others less. Deduvin shows you those odds, asks the question that would separate the leaders fastest, and lets you decide.

Can it be wrong? Yes, and so can you; that is the game. Wines are not always typical, and readings are not always right. The reveal shows which of your readings fitted the wine and which did not, which is where the learning is.

Which wines are in it? 57 wines: the reds, whites, rosés, sparkling, sweet and fortified wines most often poured at tastings in Sweden, from classic European regions to the New World. More are added when there is enough evidence to describe them properly.

Why does it say taste and spit? Because Deduvin rewards reasoning, never drinking. At a tasting of many glasses, spitting is what keeps your palate and your judgement sharp.

Who is behind it? Henrik Blomberg in Stockholm, who also makes The Wine Profile. See About.