Den här appen fungerar bra på min mobil.

Because app is a common-gender noun in Swedish, not a neuter noun.

Swedish has two grammatical genders for most nouns:

• en-words = common gender
• ett-words = neuter

App is an en-word, so you use:

• den här appen = this app

If it were a neuter noun, you would use:

• det här huset = this house

So the choice between den and det depends on the noun’s grammatical gender.

The -en is the definite ending. It means the noun is the app rather than just an app.

So:

• en app = an app
• appen = the app

In Swedish, after den här / det här / de här, the noun is usually in the definite form:

• den här appen = this app
• det här huset = this house
• de här böckerna = these books

That is different from English, where this app uses no extra ending on app.

In Swedish, a common way to say this is:

• den här for common-gender nouns
• det här for neuter nouns
• de här for plural

So den här appen is the normal spoken and written pattern for this app.

Word-for-word, it looks something like:

• den = that/it
• här = here

But together den här functions as this.

There is also a more formal alternative:

• denna app

But den här appen is the more natural everyday choice.

Fungerar is the present tense of the verb fungera, which means to work, to function, or to operate.

So:

• fungera = to function
• fungerar = functions / works

In the sentence:

• Den här appen fungerar bra ... it means This app works well ...

A useful thing for English speakers: Swedish present tense verbs are relatively simple. You do not change them for different persons:

• jag fungerar
• du fungerar
• den fungerar

The verb form stays the same.

In Swedish, bra can often mean both good and well, depending on context.

So:

• en bra app = a good app
• appen fungerar bra = the app works well

English usually separates good and well, but Swedish often uses bra in both roles.

That is very common and natural Swedish.

Here på means on, and that is the natural preposition when talking about something working on a device.

So:

• på min mobil = on my mobile / on my phone

Swedish often uses på for devices, platforms, screens, and surfaces where something appears or works.

Using i min mobil would sound more like inside my phone, focusing on the interior rather than the device as a platform.

So for apps, websites, and functions, på is the normal choice.

Because mobil is a common-gender noun, and the possessive must match that.

For singular nouns:

• min
  • common-gender noun
• mitt
  • neuter noun

Examples:

• min mobil = my mobile
• min app = my app
• mitt hus = my house

For plural, you use:

• mina böcker = my books

So mobil takes min because it is an en-word.

Yes. Mobil is commonly used as a short form of mobiltelefon.

So:

• mobiltelefon = mobile phone / cell phone
• mobil = mobile / phone

In everyday Swedish, mobil is extremely common and natural.

You may also hear:

• telefon
• mobilen = the mobile / the phone

The basic structure is:

Subject + verb + adverb + prepositional phrase

So here:

• Den här appen = subject
• fungerar = verb
• bra = adverb
• på min mobil = prepositional phrase

This gives:

• Den här appen fungerar bra på min mobil.

This is normal Swedish main-clause word order.

A very important Swedish rule is verb-second in main clauses. In this sentence, the subject comes first, so the verb comes second naturally.

For example, if you start with another element, the verb still stays in second position:

• På min mobil fungerar den här appen bra.

Yes, you could. It is correct, but it sounds more formal or written.

Compare:

• den här appen = this app, everyday and very common
• denna app = this app, more formal or official

A learner should generally prioritize den här appen, because that is what you will hear very often in normal speech.

Also notice the noun form:

• den här appen
• denna app

With den här, the noun is usually definite: appen
With denna, the noun is usually indefinite: app

Yes. Funkar is a very common, informal spoken alternative to fungerar.

So both are possible:

• Den här appen fungerar bra på min mobil.
• Den här appen funkar bra på min mobil.

The difference is mostly style:

• fungerar = more neutral, standard
• funkar = more informal, conversational

Both are very common in real Swedish.

Because Swedish does not need a helper verb like English sometimes does.

In English, you might say:

• This app does work well
• Does this app work well?

Swedish usually handles this without a separate helper verb:

• Den här appen fungerar bra.
• Fungerar den här appen bra?

So the main verb fungerar carries the meaning by itself.

You would need to change both the demonstrative and the noun form.

Singular:

• Den här appen fungerar bra på min mobil.

Plural:

• De här apparna fungerar bra på min mobil.

Changes:

• den här becomes de här
• appen becomes apparna

So:

• de här apparna = these apps

The verb fungerar stays the same, because Swedish verbs do not change for singular vs. plural in the present tense.