O aplicativo mostra a localização.

In Portuguese, it is very common to use the definite article with nouns, especially when talking about a specific thing already known from context.

• o aplicativo = the app
• aplicativo by itself can sound more general, like an app / app depending on context

So O aplicativo mostra a localização naturally means The app shows the location.

Yes. In Brazilian Portuguese, aplicativo is the standard full word for app/application.

Examples:

• Baixei um aplicativo novo. = I downloaded a new app.
• Qual aplicativo você usa? = Which app do you use?

In everyday speech, many Brazilians also say app, especially in tech contexts, but aplicativo is very common and fully natural.

Because mostra is the conjugated form of the verb mostrar.

• mostrar = to show
• mostra = shows

Here the subject is o aplicativo, which is third person singular, so the verb must match it:

• eu mostro = I show
• você/ele/ela mostra = you/he/she/it shows
• o aplicativo mostra = the app shows

The doer of the action is the subject: o aplicativo.

Portuguese word order here is straightforward:

• O aplicativo = subject
• mostra = verb
• a localização = object

So literally:

• The app
  • shows
    • the location

Here a is the feminine singular definite article, meaning the.

• o = the (masculine singular)
• a = the (feminine singular)

So:

• o aplicativo = the app
• a localização = the location

The noun localização is feminine, so it takes a.

Usually, nouns ending in -ção are feminine in Portuguese.

Examples:

• a localização = the location
• a informação = the information
• a aplicação = the application
• a direção = the direction/management

So localização takes feminine articles and adjectives:

• a localização exata = the exact location

Not exactly.

• localização = location, positioning, where something is located
• local = place, spot, venue, site
• endereço = address

So in an app context:

• mostrar a localização often means showing where something is on a map or where the user/device is
• mostrar o endereço would specifically mean showing the address
• mostrar o local would mean showing the place/site itself

Yes. In Brazil, app is widely used in casual speech and writing.

So both are possible:

• O aplicativo mostra a localização.
• O app mostra a localização.

Aplicativo is the more fully Portuguese form, while app is shorter and common in modern usage.

Because Portuguese usually does not use a separate subject pronoun for things the same way English does.

English:

• The app shows the location.
• It shows the location.

Portuguese can say:

• O aplicativo mostra a localização.
• Ele mostra a localização. (possible, but less common for objects unless needed for clarity)

Very often, Portuguese simply uses the noun again or leaves the subject understood from context.

Yes. Mostrar is a broad verb and can mean:

• to show
• to display
• to indicate
• sometimes to reveal

In a tech sentence like this, mostra could be translated as:

• shows
• displays

So O aplicativo mostra a localização could also be understood as The app displays the location.

A rough pronunciation guide for an English speaker is:

oo ah-plee-kah-CHEE-voh MOHS-trah ah loh-kah-lee-zah-SOWN

A few notes:

• aplicativo in Brazil often sounds like aplicatívo, with stress on ti
• mostra has the stress on mos
• localização has nasal sound at the end: -ção

A more natural connected pronunciation may sound something like:

u aplicatívu mostra a localizaçãu

The articles o and a are often pronounced more like u and a in normal Brazilian speech.

In Brazilian Portuguese, unstressed o at the end or in weak positions is often pronounced like u.

So:

• o aplicativo may sound like u aplicativo

This is normal pronunciation, even though it is still written o.

Similarly, unstressed e can sound like i in many accents.

Yes. Aplicativo can refer to an app or software application in general. In most modern everyday contexts, especially on a phone or device, English speakers would naturally translate it as app.

So depending on context:

• O aplicativo mostra a localização. = The app shows the location.
• possibly The application shows the location.

But app is usually the best natural translation.

Grammatically, Portuguese normally prefers the articles here:

• O aplicativo mostra a localização.

Without the articles, it sounds more like a headline, note, label, or very telegraphic style:

• Aplicativo mostra localização

That might appear in UI text, titles, or simplified instructions, but in a normal full sentence, the version with articles is more natural.

It would be:

Os aplicativos mostram a localização.

Changes:

• o → os = the (masculine plural)
• aplicativo → aplicativos
• mostra → mostram

If the object also became plural:

• Os aplicativos mostram as localizações. = The apps show the locations

But in many real contexts, a localização would stay singular.

Yes. This is a very useful basic pattern:

[subject] + [verb] + [object]

Examples:

• O mapa mostra a rota. = The map shows the route.
• O sistema mostra o resultado. = The system shows the result.
• O site mostra os preços. = The website shows the prices.
• O celular mostra a mensagem. = The phone shows the message.

So you can reuse this structure very easily.