How to make custom iphone/ipad wallpaper without a computer.

Iphone/ipad custom wallpaper tutorial. iphone & ipad standard wallpaper sizes Iphones Iphone Se 640x1136 iPhone 6 plus/6splus - 1242 x 2208 Iphone 6/6s 750x1334 iphone 5/5s 640x1136 - Iphone 4/4s - 960x640 Ipads Ipad Mini - 1536x2048 Ipad Air - 1536x2048 Ipad pro - 2048x2732