IOS app for iPhones

[Bartc]

I occasionally use Artist Grid on my Android phone. It's good for taking a photo and adding grid lines, but also will do some filtering tricks, like B&W, finding edges and/or posterization. Simple but effective.

My friend would like something similar for his iPhone, since Artist Grid appears to only work on Android devices. Does anyone have any recommendations? He's not just looking for the grid, he wants those other tricks to help him compose.

Thanks.