Wpisuję kod BLIK w aplikacji.

Wpisuję is the 1st person singular present tense form of the verb wpisywać / wpisać, meaning I enter, I type in, or I input.

So:

• wpisuję = I am entering / I enter
• infinitive (imperfective): wpisywać
• infinitive (perfective): wpisać

In this sentence, wpisuję sounds natural for an action in progress or a general present action: I’m entering the BLIK code in the app.

Polish often omits subject pronouns when they are clear from the verb ending.

Here, wpisuję already tells you the subject is I, because the ending -ę marks 1st person singular.

So:

• Wpisuję kod BLIK w aplikacji. = I enter / I’m entering the BLIK code in the app.
• Ja wpisuję kod BLIK w aplikacji. also means the same thing, but ja adds emphasis, like I’m the one entering it.

English usually needs the subject pronoun; Polish often does not.

Because kod is the direct object of the verb wpisuję, so it appears in the accusative case.

For masculine inanimate nouns like kod, the accusative singular looks the same as the nominative singular.

So:

• nominative: kod
• accusative: kod

That is why you see wpisuję kod.

If it were a different noun, the form might change more visibly.

BLIK is a proper name: the name of a Polish mobile payment system.

In kod BLIK, BLIK functions like a kind of label or brand name: BLIK code.

Very often in everyday Polish, brand names used this way do not change, especially in expressions like:

• kod BLIK
• aplikacja BLIK
• płatność BLIK

So in this sentence, BLIK stays BLIK.

Because after w meaning in, Polish uses the locative case, not the accusative.

So:

• w aplikacji = in the app

The noun aplikacja changes like this:

• nominative: aplikacja
• locative: aplikacji

That is why the sentence has w aplikacji.

Compare:

• w domu = in the house
• w szkole = at school / in school
• w aplikacji = in the app

In Polish, w aplikacji is the natural way to say in the app. In English, depending on context, people may say either in the app or on the app, but Polish normally uses w here.

So if you are using an app interface, Polish typically says:

• w aplikacji
• literally: in the application/app

This is standard and natural.

Here it is singular.

The basic form is:

• aplikacja = app / application

After w, it becomes locative singular:

• w aplikacji = in the app

Even though -i may look plural to an English speaker, in this case it is not plural.

Yes. Polish word order is more flexible than English, although some versions sound more neutral than others.

The most neutral order here is:

• Wpisuję kod BLIK w aplikacji.

You could also hear:

• W aplikacji wpisuję kod BLIK.
  Emphasis on in the app
• Kod BLIK wpisuję w aplikacji.
  Stronger focus on the BLIK code

But for a learner, the original sentence is a very natural default.

Wpisuję is imperfective.

Polish verbs often come in aspect pairs:

• wpisywać = imperfective
• wpisać = perfective

Why it matters:

• imperfective focuses on the process, repetition, or ongoing action
• perfective focuses on completion

So:

• Wpisuję kod BLIK. = I am entering / I enter the BLIK code
• Wpiszę kod BLIK. = I will enter the BLIK code / I’ll enter it (completed action in the future)

A perfective verb generally does not have a normal present-tense meaning. Its “present” forms usually refer to the future.

Yes. The Polish present tense can describe:

• something happening right now
• a habitual or repeated action
• a general present fact

So Wpisuję kod BLIK w aplikacji can mean either:

• I’m entering the BLIK code in the app
  or
• I enter the BLIK code in the app

Context tells you which meaning is intended.

A rough English-friendly guide:

• wpi- sounds approximately like vpi-
• -su- like soo
• -ję like a nasalized yeh/yen sound, though this is only approximate

A rough overall approximation might be:

• vpee-SOO-yeh (very approximate)

A few helpful points:

• Polish w is pronounced like English v
• Polish j is pronounced like English y
• ę is a nasal vowel, so it does not have an exact English equivalent

You do not need a perfect accent at first; just recognizing that wpisuję starts with a v sound is already useful.

Yes. Aplikacja is the standard word for application/app.

In everyday modern Polish, people often use:

• aplikacja
• sometimes more specifically aplikacja mobilna = mobile app

So w aplikacji is completely normal and idiomatic.

Yes, you could, and it would be understandable. Wprowadzam also means I enter / I input.

However, wpisuję is often especially natural when talking about typing in a code, password, number, or text.

A useful distinction:

• wpisuję = I type in / enter by writing or keying in
• wprowadzam = I enter / input, often a bit broader or more formal

For a code, wpisuję kod sounds very natural.

Polish has no articles.

So:

• kod can mean a code or the code
• aplikacji can mean in an app or in the app

Context tells you which meaning is intended.

In this sentence, because BLIK code is usually a specific code in a specific situation, English often translates it as:

• I’m entering the BLIK code in the app.

But Polish does not need a separate word for the.