Slightly vague question, but if it's ANY app then surely anyone with a Smartphone uses apps?
Big-haired Bitch/Personality Hire
I use a 'Daily Titties' app.
It's like one of those daily Bible verse or daily horoscope apps, except instead of inspiring or condemning words from God and all his homies or what the position of the stars says about my life, it's titties.
Just titties.
░P░U░S░S░Y░ ░I░N░ ░B░I░O░
On today's mobile phones (actually a computer) even the fact you can make a phone call is because of an app; therefore the answer has to be yes.