Aplikasi ini bagus.

• aplikasi = application or app
• ini = this
• bagus = good, nice, great, or well-made, depending on context

So the structure is literally something like application this good, which Malay uses to mean This app is good.

Malay often leaves out the verb to be in simple sentences like this.

So instead of saying something that literally matches This app is good, Malay simply says:

• Aplikasi ini bagus = This app is good

This is completely normal. In sentences where English uses is/am/are before an adjective or noun, Malay often does not need any equivalent word.

In Malay, demonstratives like ini (this) and itu (that) usually come after the noun.

So:

• aplikasi ini = this app
• buku ini = this book
• rumah itu = that house

This is one of the first word-order differences English speakers notice.

Because bagus is the description of the noun phrase aplikasi ini.

The sentence is built like this:

• Aplikasi ini = this app
• bagus = good

So the full sentence is literally:

• This app — good

That is a normal Malay sentence pattern.

Also, Malay adjectives often come after the noun when directly modifying it:

• rumah besar = big house
• buku baru = new book

But in Aplikasi ini bagus, bagus is functioning as the predicate: it tells you something about this app.

It is a borrowed word, and it is very common in modern Malay. It comes from the same source as English application.

In everyday Malay, aplikasi is the normal word for a software app, mobile app, or application in many contexts. So for learners, it is a very useful and natural word to know.

A simple approximate pronunciation is:

ah-plee-KAH-see EE-nee BAH-goos

A few helpful notes:

• a is usually like the a in father
• i is usually like ee in see
• u is usually like oo in food
• g in bagus is a hard g, like in go
• stress in Malay is usually not as strong or contrastive as in English, so it is best to say it smoothly rather than heavily stressing one syllable

Yes. Bagus is a flexible everyday adjective. Depending on context, it can mean:

• good
• nice
• great
• excellent
• well done
• well-made

So Aplikasi ini bagus could suggest:

• the app is good in quality
• the app works well
• the app is nicely designed
• the app is impressive

The exact shade of meaning depends on the situation.

Yes, it is completely natural.

Aplikasi ini bagus is short, clear, and idiomatic. It sounds like something a real speaker would say when giving an opinion about an app.

You could also make it stronger:

• Aplikasi ini sangat bagus = This app is very good
• Aplikasi ini bagus sekali = This app is very good / really good

You could, but it would usually sound less complete unless the context is very clear.

• Aplikasi ini bagus = This app is good
• Aplikasi bagus could sound more like a good app or apps are good, depending on context

So if you mean one specific app in front of you, aplikasi ini is the clearer choice.

The opposite is itu, meaning that.

So:

• Aplikasi ini bagus = This app is good
• Aplikasi itu bagus = That app is good

Like ini, itu also comes after the noun.

It is neutral and works in both speech and writing.

It is simple enough for conversation, but also perfectly acceptable in standard written Malay. If you wanted to sound a bit more formal or specific, you might say:

• Aplikasi ini sangat baik in some contexts

But for describing an app, bagus is often the most natural everyday choice.