[Graybeard58]

I don’t even know what an “app” is, nor do I care.

[GaltAdonis]

"...I don’t even know what an “app” is..."

Simply put: An 'App' (short for 'application') is a
computer program that does something.
That 'something' that it 'does' is whatever it
was designed and built to do.

With any luck, it may actually do it.
But no guarantees, of course.