This app was mentioned in 4 comments, with an average of 20.25 upvotes
don't know if it's on iOS, but the 555JojoCamera for Android is pretty sweet. you can add ゴゴゴゴゴゴ and other effects to any photo
It's a little rough to us, but this is it
https://play.google.com/store/apps/details?id=com.kumadot.JojoCamera
Might this be what you're looking for?