kono apuri nara, sumaho de mo siryou wo daunroodo dekiru.

Here, なら sets up a topic with a conditional nuance: if it’s this app or when it comes to this app.

So このアプリなら suggests something like:

• If you use this app, ...
• As for this app, ...
• With this app, at least, ...

It often implies contrast with other possibilities. For example, the speaker may be thinking:

• Other apps might not allow this.
• But this app does.

So the sentence has a nuance like: If it’s this app, you can even download materials on a smartphone.

The comma marks a natural pause after the topic/condition:

• このアプリなら、
• スマホでも資料をダウンロードできる。

It helps separate the condition/topic from the main statement. In English, this is similar to pausing after As for this app, ... or If it’s this app, ...

The comma is helpful, but not always absolutely required.

No. Here でも does not mean but.

In this sentence, でも means even with, even on, or also with depending on context.

So スマホでも means:

• even on a smartphone
• also on a smartphone
• with a smartphone too

The exact nuance depends on context, but even on a smartphone is often the best fit, because it suggests that doing this on a smartphone might be surprising or especially convenient.

The particle で marks the means, tool, or place where an action happens.

So スマホで can mean something like:

• with a smartphone
• using a smartphone
• on a smartphone

In this sentence, the smartphone is the device used to do the downloading.

So:

• スマホでダウンロードする = download using a smartphone / download on a smartphone

Adding も gives extra emphasis or inclusion.

• スマホで = with/on a smartphone
• スマホでも = even with/on a smartphone or with/on a smartphone too

This suggests one of these ideas:

1. You can do it on a computer, and also on a smartphone.
2. A smartphone might seem less suitable, but you can do it even there.

So でも adds a nuance of surprise, inclusion, or contrast.

資料 usually means materials, documents, resources, or reference materials.

The exact English word depends on context. It could refer to:

• handouts
• business documents
• study materials
• reference files
• informational documents

It is a fairly broad word, so the translation changes depending on what kind of content the app provides.

を marks 資料 as the thing being downloaded.

So:

• 資料をダウンロードする = download materials/documents

Then できる is added to show ability or possibility:

• 資料をダウンロードできる = can download materials

You may have learned that potential expressions sometimes use が instead of を, and that is true. For example:

• 資料がダウンロードできる

is also possible.

In modern Japanese, both を and が can appear with potential expressions, though the nuance and usage can vary. In everyday Japanese, を with verbs like ダウンロードできる is very common.

ダウンロードできる is the shorter, more natural form in everyday Japanese.

Compare:

• ダウンロードできる = can download
• ダウンロードすることができる = is able to download

Both are correct, but ダウンロードできる is more direct and conversational.

This works because ダウンロードする is a suru-verb, and its potential form is:

• ダウンロードする → ダウンロードできる

Here できる most naturally means it is possible / one can do it.

Depending on context, that can feel like:

• ability: you are able to do it
• possibility/function: the app allows it
• practical availability: it can be done

In this sentence, it most likely refers to functionality:

• This app lets you download materials, even on a smartphone.

So it is less about personal skill and more about what the app makes possible.

The subject is omitted, which is very common in Japanese.

The sentence does not explicitly say you, we, one, or people. Depending on context, it could mean:

• you can download
• we can download
• people can download
• it is possible to download

Japanese often leaves the subject unstated when it is obvious from context or not important.

So the focus here is not on who, but on what is possible with this app.

Yes, that is possible.

• 資料をダウンロードできる
• 資料がダウンロードできる

Both can be used.

A simple way to think about the difference:

• を keeps 資料 as the direct object of download
• が can emphasize what is possible to download

In real Japanese, especially with borrowed verbs like ダウンロードする, を is very common and sounds natural.

So for learners, it is best to recognize that both exist, and this sentence with を is perfectly normal.

They are loanwords, mostly from English:

• アプリ = app (from application)
• スマホ = smartphone
• ダウンロード = download

Katakana is commonly used for:

• foreign loanwords
• technical terms
• brand-like or modern vocabulary
• emphasis, in some cases

Also, スマホ is a shortened form of スマートフォン.

The sentence does more than just state a fact. It suggests convenience or contrast.

A natural nuance is something like:

• If you use this app, you can even download materials on a smartphone.
• With this app, you can download materials even on your phone.

The important shades of meaning are:

• このアプリなら: this app is being presented as the useful option
• スマホでも: even a smartphone is enough / a smartphone works too
• ダウンロードできる: the app makes this possible

So the sentence sounds like a selling point or a helpful recommendation.