wont download

Ive found that, on my old Iphone 6, that this app is aarvelous and ive made many funny videos but on my new Iphone 6 plus, this app doesnt even show up on the app store and when I tried to look it up on my computer and try to download it from there, it still didnt work. Please make sure this app shows up on every Iphone and I will be very pleased.

jennstpeters about iMovie