When does your website need (or needn't) a responsive design? First, even if you already have a responsive design and you know how to build a responsive website, you cannot claim that you don't need an app. It is necessary to determine whether an app will enhance your website and attract more new users, or it will become a waste of money. Everything you need is to understand what you can give your end users.
However, if you just intend to create a website, you should think about whether it is worth developing a responsive web design or make a non-responsive web design for a start. It depends on a goal you want to pursue. Let's find out when you need a mobile app, and check out benefits of responsive web design as well.
Blake Strickland
Sergio Jemas, It depends on it functionality and complexity. HTML, CSS, Javascript. Also you can try this service https://aidaform.com to save time.