Serious question

I am pretty naive when it comes to these influencers- I just click through stories and don’t analyze or think twice about anything, HOWEVER, her weight loss is inevitably noticeable and scary from someone who has struggled with ED and BDD.

ANYWAYS- prior to all of this extreme weight loss. Everyone has accused her of using filters in her stories. Just out of curiosity, what are these apps that they are using that do that? That’s literally insane.