family sharing problem with app? ipad version vs iphone version

are the ipad and iphone versions separate? i purchased this years ago on a family members apple account and we have family share, but i currently am unable to get access to the app on my phone. are the versions completely different and do i have to purchase it again for my iphone?

nevermind, turns out it was purchased on a siblings account that not longer is part of the family sharing plan as they have married and moved out and such