I recently got the iPhone 6s Plus. I love it. But no, I don't use my iPad Air less. The screen size of the phone is great but can't compare to the tablet. For me, iPhone is used when on the go. It functions as my iPod, e-reader, camera, phone, and instead of a small tablet. Otherwise I'm on the iPad Air. I debated between the 6s and the 6s Plus. The determinant was I really wanted the larger screen and the better camera. This is my first iPhone. I would not have traded the 6s for the 6s Plus.