A website presents
A website presents a company, its services or a product and leads the visitor towards an enquiry or a purchase. The content is mostly the same for everyone: copy, images, pricing, a blog, a contact form. Its job is to be found on Google, to load fast and to make clear quickly what you offer.
A web application does
A web application lets the user get something done: sign in, enter data, book a slot, pay, track an order or manage an account. Each user sees their own data, and behind the interface sit a database, business rules and security.
A quick test
- Do users need to sign in and have their own account? Then it is an app.
- Is the data users enter saved and used later? App.
- Do you mainly need clients to find you and send an enquiry? Website.
- Does the content change only when you edit it? Website, with a CMS if needed.
When you need both
A common and sensible combination is a public, search-optimised website plus an application behind a login. The website brings users in, the app keeps them. They are built together but planned separately, because their goals differ.
How not to overpay
If at first you only need clients to find you, start with a website and one good enquiry form. Add the application once you know which work you want to automate. The opposite happens often: a company pays for an app when what it needed was a good website.