Learn Danish: Har du den nyeste version af appen? - Do you have the newest version of the app?

The article and adjective must agree with the noun they describe. The noun here is version, which is an en word (common gender). Therefore, you use the common gender definite article den. If the noun were an et word, like program, you would say det nyeste program.

How do you form the superlative "newest" in Danish?

You take the base adjective ny (new) and add the suffix -este, giving you nyeste. Normally, adjectives get an extra -e ending when following a definite article like den, but since superlatives ending in -ste already end in an -e, the form does not change.

Is af always the correct translation for the English word "of"?

Not always! English uses "of" for many different relationships, but Danish is more specific. Here, af is used because it describes a component, type, or edition of something. If you were talking about ownership, like "the door of the house," Danish would often use til or simply add an -s to the owner.

How do English tech loanwords like "app" work in Danish grammar?

Danish adopts many English tech words and usually treats them as regular Danish nouns. Most become en words (common gender). So "an app" is en app, and to say "the app," you attach the standard definite suffix -en to the end, making it appen.