# App vs ATR

> English confusable word pair

## The two words

### App
*name · frequency rank #1,445*
A surname from German.

### ATR
*noun · frequency rank #46,320*
Initialism of advanced tongue root.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/app-vs-atr