To be fair, they aren't wrong. Web applications are applications. Who says native mobile applications are the only kind of applications?
Though if you call the PNG file that's a menu for your restaurant an app, that's just wrong.
Though if you call the PNG file that's a menu for your restaurant an app, that's just wrong.
And that's why they are wrong. If anything and everything can be called an app then the word lost its meaning.
Definitions of the verb apply from https://en.wiktionary.org/wiki/apply#Verb:
2. (transitive) To put to use; to use or employ for a particular purpose, or in a particular case
to apply funds to the repayment of a debt
We need to apply the skills we've learned to solve this problem