Resizing camera based on device

so my current project is a side scroller. At the moment its almost complete but the issue im facing is while i test everything on an ipad and ipad mini the size looks great but when i test on an iphone everything is small and hard to see. what im looking for is a way to decrease the field of view. Im fine with the fact that i wont be able to see as far in any direction as i would on an ipad but i have a character and objects around the scene that hes supposed to gather so id like for those to be seen larger on the iphone preferably without changing the display to drastically on other devices like the ipads and tablets