Technology vocabulary

App for or app on?

App is a noun, not a verb. Use app for when describing purpose, and app on when referring to a platform or device.

Quick answer

Using app with for and on

Use app for to describe what the app is used for. Use app on to show the device or platform where it runs. These are not fixed verb-preposition patterns because app is a noun.

I need an app for editing photos.
The app on my phone keeps crashing.
She downloaded an app for language learning.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
app for + purpose

Describing what an app is used for

Use for before an activity or purpose.

They created an app for tracking expenses.
2
app on + device

Showing where the app runs

Use on before a phone, tablet, computer, or platform.

The app on my tablet updates automatically.
3
app for + audience

Naming the target users

For can also introduce the intended users.

This is an app for children learning maths.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
app for
We use an app for booking flights.
Shows purpose or intended use.
app on
The app on my laptop needs an update.
Shows location or platform.
app in
The app in the folder is outdated.
In describes location, not a fixed combination.
app to
Incorrect: an app to budgeting
Use app for budgeting instead.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Treating app as a verb

App is normally a noun in modern English.

✕ We apped on the website. ✓ We used the app on the website.

Using on for purpose

Use for when describing what the app does.

✕ I need an app on learning languages. ✓ I need an app for learning languages.

Using to after app

For is the standard choice before activities.

✕ an app to tracking habits ✓ an app for tracking habits

Quick practice

Choose the expression that matches the intended meaning.

1. I downloaded an app ___ meditation.
2. The app ___ my phone stopped working.
3. They designed an app ___ teachers.

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Frequently asked questions

Is app a verb?

In standard everyday English, app is mainly used as a noun meaning application.

When do we use app for?

Use app for to describe the purpose or users of an app.

When do we use app on?

Use app on to refer to the device, platform, or location where the app runs.

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