(I wasn't sure where to ask this so I'm posting it here) If I put an app on to the app store through a publishing company (e.g. Ketchapp), would the game legally be theirs, or would I still be able to claim ownership to it?
You still own the Interlectual Propety (it's still your game) you have just granted them rights to use it for a pre determined amount of time. A couple years typically...