I currently use 5 in total. I take just about all my photos from my phone, Samsung Galaxy S4.
I keep the app installed on my phone for the filters.
Once I’ve added a filter to more than one photo, I can make a collage with this app. Or, I can make the collage first then add a filter later.
I use this app for the stickers, but I mainly just use the strawberry sticker.
Have fun taking photos!