App no longer supported
I have an app that I've using for a while on my ipad. I want to add it to my iphone but the company is no longer in business and cannot support the app, it it no longer available in iTunes. Since I have the app on my ipad,and it is backed up both on Computer and icloud, is there a way that I can add it to the iphone?
iPhone 6, iOS 9.3.2