kono apuri ha sousa ga kantan de, waifai ga nakute mo tukaeru.

They are doing different jobs.

• このアプリは sets the topic: as for this app...
• 操作が簡単 says what is true about it: its operation is simple
• ワイファイがなくても means even if there is no Wi-Fi

So は introduces the thing being talked about, while が marks the subject inside each description.

A natural breakdown is:

• このアプリは = as for this app
• 操作が簡単で = its operation is simple, and...
• ワイファイがなくても使える = it can be used even without Wi-Fi

This is very common in Japanese: one big topic marked by は, and smaller subjects inside the sentence marked by が.

操作が簡単 is the more neutral, descriptive way to say the operation is simple or it is easy to use.

With adjectives like 簡単, Japanese often marks the thing being described with が:

• 日本語が難しい = Japanese is difficult
• この問題が簡単 = this problem is easy
• 操作が簡単 = operation/use is simple

If you said 操作は簡単, it would sound more contrastive, like:

• As for the operation, it’s simple
  (maybe implying something else is not simple)

So が fits better here for a straightforward statement.

操作 literally means operation, handling, or how to use something.

In this sentence, 操作が簡単 means:

• the operation is simple
• more natural English: it’s easy to use

So this is a good example of Japanese using a noun phrase where English might prefer a different wording.

You could think of it as:

• 操作が簡単 = the controls/use are simple
• natural meaning = easy to operate / easy to use

Here, で connects two parts of the sentence.

簡単 is a na-adjective, and its connective form is で:

• 簡単だ = is simple
• 簡単で = being simple / and is simple

So:

• 操作が簡単で、ワイファイがなくても使える
• It is easy to use, and it can be used even without Wi-Fi

This で works like and or and also when linking descriptions.

Compare:

• 静かだ → 静かで
• 便利だ → 便利で
• 簡単だ → 簡単で

なくても means even if there isn’t... or without...

In this sentence:

• ワイファイがなくても使える
• can be used even if there is no Wi-Fi
• more natural English: can be used without Wi-Fi

This comes from ない + ても:

• ない = not exist / not have
• ても = even if

So:

• なくても = even if there is not / even without

This pattern is very common:

• お金がなくても大丈夫 = It’s okay even if you don’t have money
• 見なくてもいい = You don’t have to look
• 行かなくてもいい = You don’t have to go

In your sentence, it implies the app still works under that condition.

Because ない and ある usually take が, not を, when they mean there is / there isn’t.

So:

• ワイファイがある = there is Wi-Fi
• ワイファイがない = there is no Wi-Fi

That is why the sentence uses:

• ワイファイがなくても = even if there is no Wi-Fi

Using を would not fit here.

Yes. ワイファイ is a katakana spelling of Wi-Fi.

Katakana is often used for:

• loanwords
• foreign names
• technology terms
• brand-like or modern-sounding words

You may also sometimes see Wi-Fi written in Roman letters in Japanese text, especially in ads, apps, or technical writing.

使える is the potential form of 使う.

• 使う = to use
• 使える = can use / is usable

So here:

• ワイファイがなくても使える
• it can be used even without Wi-Fi

This can describe either:

1. someone’s ability to use something, or
2. whether something is usable

Here it means the app is usable without Wi-Fi.

Because Japanese often leaves out things that are understood from context.

The topic is already このアプリ (this app), so 使える is understood as:

• this app can be used
• or you can use this app

Japanese does not always need to state:

• you
• it
• people
• one

The meaning is clear from context.

So even though 使える literally looks like can use, in context it means:

• can be used
• is usable

It is in plain style, not polite ます style.

• 使える = plain
• polite version: 使えます

A polite version would be:

• このアプリは操作が簡単で、ワイファイがなくても使えます。

The plain style is still very common in:

• advertisements
• product descriptions
• casual explanations
• written summaries

So this sentence sounds natural for app promotion or description text.

Yes. A very literal translation is the operation is simple, but more natural English would often be:

• It’s easy to use
• It’s simple to operate
• The controls are easy
• It’s user-friendly

Japanese often uses wording that sounds more abstract or noun-based than natural English does. So when translating, it is often better to choose natural English rather than follow each word exactly.

ても means even if or even though.

So:

• なくて by itself is just a connecting form: not existing, and...
• なくても adds the idea even if it doesn’t exist

That matters a lot here.

Compare:

• ワイファイがなくて使えない
  = There is no Wi-Fi, so it can’t be used

• ワイファイがなくても使える
  = Even without Wi-Fi, it can be used

So も is important because it gives the sense of even under that condition.

Yes, that is basically one of the natural implications.

The sentence literally says:

• Even if there is no Wi-Fi, it can be used

A very natural English interpretation is:

• You can use it without Wi-Fi
• It does not require Wi-Fi

So while the grammar is even if there isn’t Wi-Fi, the practical meaning is often Wi-Fi is not necessary.

The comma just helps readability by separating the two linked ideas:

• 操作が簡単で、
• ワイファイがなくても使える。

Japanese commas are often used more flexibly than English commas. This comma is not strictly required in every case, but it is very natural in writing because the sentence has two descriptive parts.

Yes. That is exactly what the sentence is doing.

The topic このアプリは applies to both following descriptions:

1. 操作が簡単で = it is easy to use
2. ワイファイがなくても使える = it can be used without Wi-Fi

So the sentence structure is:

• As for this app, [it is easy to use] and [it can be used without Wi-Fi].

This is a very common Japanese pattern:

• X は A で、B。
• As for X, it is A, and B.

No. The correct form is なくても, not ないても.

For i-adjectives and ない, the -ても form is made like this:

• remove the final い
• add くても

So:

• ない → なくても
• 高い → 高くても
• 難しい → 難しくても

That is why:

• ワイファイがなくても is correct

Yes. For example:

• このアプリは操作が簡単で、ワイファイがなくても使えます。
  Polite version.

Or more explanatory:

• このアプリは操作が簡単で、ワイファイがなくても使用できます。
  A bit more formal, using 使用できます instead of 使える.

But the original sentence is very natural and common, especially for product descriptions.