Thats really cute :) I like how the high exposure effect made the picture look a bit like a drawing.
I use the Retrica app, it's not an editing app but a pre-effect app, a well known one.
For editing - I use Photoshop :) I'm fortunate enough to know that program well enough - started messing with it when I was 13 and never stopped, that's a lovely program to those who know how to use it well, albeit a complicated one for those who has no deep knowledge of it.
I have a nice smiling flower connected to a wire that is looped on the arm of the chair next to my bed - it makes the chair so merry :)