Nothing on your computer is an "app". Nothing on your phone is an "app", either.
Not only is it factually incorrect to refer to software as an "app", but it is gramatically incorrect, too.
The word "app" did not exist when I first started using computers. There were simply software, programs, scripts, etc.
Ever heard of someone having the job title of "apper"? You haven't? That's because programmers make programs, not "apps".
The 'word' "app" itself is a phonetic infantilization of the word "Application", and grammatically speaking, programs are not "applications", they have applications.
The application of a program is the property of what task the program was designed to achieve. The application of the MS File Explorer is to browse and interact with the file system.
The aplication of a web browser program is to access web sites and accomplish other web-based activities.
The application of a screwdriver is to turn a screw. The application of a nail is to be stuck by a hammer. Any given piece of software may have a myriad of applications.
To render an entire program, or suite of programs, down to just one "applicaiton" is usually incorrect. The majority of software written these days have multiple use cases, or applications.
It is incorrect to refer to a box of tools as an "application". Each one of those tools has the attribute of serving one or many applications, but the tools are not applications within themselves.
The only type of software which could argued to be an "app" are what used to be called "applets", and even then, an "applet" is not an "app". It's just a small program.
These small programs are written to achive very specific tasks, but they are still programs written by a programmer. They weren't written by an "apper".
We have gone into such an extreme deep end of "user friendly" territory that we are simulatneously bastardizing our own language and promoting computer illiteracy.