App/web app for workers on the field. Do I need internet?

I need to create a simple app for civil engineer. It will be a simple app, with a simple form that a worker on the field will fill out and save the info in a database. Sometimes the user may don't have access to internet.

For what I've seen, I have two options:

1-> create a simple website, and the user can access to the website wherever he has internet 2-> create an app, more than like it for android platforms.

Is there anyway to make it so that the app doesn't need internet to work?

thanks