They're making movies about apps now.

Sounds like a Twilight Zone episode, if Twilight Zone were still good.

its the end times!

Disney did a movie about an App a few years ago but it was played for humor.

Probably what someone said the first time they made a movie about a cell phone. And the first time they made a movie about the internet. And the television. And the telephone.

They've been doing it for quite a while.

The Den (2013) was about chatroulette
Unfriended (2014) and Friend Request (2016) were about a social network
Bedeviled (2016) was about a deadly phone app
Unfriended: Dark Web (2018) was about the dark web (woooooo!)

I'm sure I'm forgetting other horror movies were smartphones were involved (demonic or unexplained messages or calls, etc). If we're not talking just of horror movies then there are definitely a few more out there.