W3schoolsはWeb開発者向けアプリです
W3schools is a web developers app, with tutorials and references on web development languages such as HTML, CSS, JavaScript, PHP, SQL, W3.CSS, and Bootstrap, covering most aspects of web programming.
W3schools is a android app, which will help you to learn HTML, CSS, PHP, Java Script, J query, Asp, Bootstrap, SQL and other web programming languages.
learn HTML
learn CSS
learn java script
learn PHP
learn j query
learn SQL
learn asp
learn bootstrap