noun
web application
Computing term for an application accessed via a web browser.
このウェブアプリケーションはブラウザ上で動作します。
This web application runs in the browser.
Spelling with a middle dot, also seen in technical writing.
アプリ is a broader term for any application, including mobile apps, while ウェブアプリケーション specifically refers to browser-based applications.
Loanword from English 'web application'.