API vs app, What's the Difference?

Which to use

“API” and “app” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#18,115
“API” frequency rank: #8,652
“app” frequency rank: 26767
confusion score

Side-by-Side Comparison

Feature	API	app
Definition	Alphabet phonétique international.	Application.

Where the eye mixes API and app

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch

API

3 ch

app

Look-alike desk: API vs app

A purely visual mix-up. API (\a.pi\) and app (\ap\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by a single letter - i in “API” becomes p in “app”. Our composite confusion score for this pair is 26767, derived from the frequency rank of both members and their visual similarity.

API is recorded at frequency rank #18,115, classified as anoun, pronounced \a.pi\. app is at rank #8,652, tagged as anoun, pronounced \ap\.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 26767, this pair ranks #332,979 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of API vs app

Shared letters: ap. Private to "API": i. Private to "app": -.

"API" · 3 letters · shape VCV · "app" · 3 letters · shape VCC

Frequently Asked Questions

Can "API" and "app" be used interchangeably?

No. They are said differently (\a.pi\ versus \ap\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Which is more common, "API" or "app"?

"app" is the more common of the two: it sits at frequency rank #8,652 in our French list, against #18,115 for "API". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "API" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "app" - compare definitions side by side with the headword page. Word entry
This pair ranks #332,979 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"API" and "app" also get mixed up with nearby pairs, the highest-scored neighbour is "API vs aur". Nearby pair

Confusion rank #332,979 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.