Det står i appen, at leveringsdatoen er ændret.

Yes, literally stå means to stand, but Danish often uses det står ... to mean it says / it is written / it states.

So Det står i appen ... is a very natural way to say that some written information appears in the app.

A more literal English gloss would be: It stands in the app that ... But natural English is: It says in the app that ...

This is a fixed, common usage in Danish.

Here det is a kind of formal or anticipatory subject. It fills the subject position before the real content of the sentence appears.

The real information comes in the at-clause: at leveringsdatoen er ændret

So the structure is basically: Det står i appen, at ... = It says in the app that ...

This works a lot like English it in sentences such as: It says on the website that ...

In Danish, i appen is the normal way to say in the app when you mean information contained inside the app.

Danish often uses i for digital environments when talking about what appears within them:

• i appen
• i systemet
• i programmet

English sometimes uses on the app, but Danish typically prefers i appen in this kind of sentence.

Here at means that and introduces a subordinate clause.

So: Det står i appen, at leveringsdatoen er ændret.

Breaks down like this:

• Det står i appen = It says in the app
• at leveringsdatoen er ændret = that the delivery date has been changed / is changed

Be careful: at can also mean to before an infinitive, but not here. In this sentence it is clearly the conjunction that.

Because after at, you have a subordinate clause, and Danish subordinate clauses normally use subject + verb word order.

So you get: at leveringsdatoen er ændret

• subject: leveringsdatoen
• verb: er

This is different from main clause word order in Danish, where the finite verb usually comes in second position.

Compare:

• Main clause: Leveringsdatoen er ændret.
• Subordinate clause: ... at leveringsdatoen er ændret.

In this example, the order looks the same in both languages, which is helpful.

Because Danish, like English, often forms compound nouns, but Danish does this even more consistently and writes them as one word.

leveringsdatoen is built from:

• levering = delivery
• dato = date
• -en = the

So: leveringsdatoen = the delivery date

A very important rule in Danish is that compound nouns are usually written as one word.

The -en is the definite ending, meaning the.

In Danish, the definite article is often attached to the noun instead of being a separate word.

So:

• en leveringsdato = a delivery date
• leveringsdatoen = the delivery date

Notice that in compounds, the definite ending goes on the whole compound:

• leveringsdato → leveringsdatoen

Not on the first part.

Ændret is the past participle of ændre, which means to change.

So:

• ændre = to change
• ændret = changed

In er ændret, the participle works with er to describe the result of a change: is changed / has been changed

This is very common in Danish.

Both are possible, but they are slightly different in feel.

• er ændret often focuses on the current result or state
• er blevet ændret focuses more clearly on the fact that a change happened

In many real-life contexts, er ændret is the more natural and compact choice, especially in messages, notifications, and status updates.

So:

• leveringsdatoen er ændret = the delivery date has been changed / is now changed
• leveringsdatoen er blevet ændret = the delivery date has been changed

The second one is a bit more explicit, but the first one is very idiomatic.

Yes, effectively it is.

er ændret does not say who changed the delivery date. The focus is on the delivery date itself, not on the person or system that made the change.

That is why English often translates it with a passive: the delivery date has been changed

So even though the Danish structure is not identical to English passive grammar in every detail, it functions very much like a passive or resultative expression here.

The comma before at is normal, but whether it is strictly required depends on the comma style being used.

In Danish, many writers put a comma before subordinate clauses: Det står i appen, at leveringsdatoen er ændret.

But you may also see: Det står i appen at leveringsdatoen er ændret.

Both can be accepted depending on the comma system or house style. So as a learner, the important thing is to recognize that the at-clause is subordinate; the comma itself is partly a style choice.

You can for understanding, but not for natural English.

Word-for-word: It stands in the app

Natural English: It says in the app or It says on the app or The app says

So for learning grammar, the literal meaning is useful. For translation, though, you should choose the natural English expression rather than the literal one.