Many years ago, when I was a wedding photographer, I used a Hasselblad. I loved the 2 1/4 x 2 1/4 square format. Although many iPhone apps allow you to create a square image, I finally found one that does exactly what I want it to do. As the developer puts it, "If you find other camera apps over-fussy (and their photographs annoyingly oblong) then 6x6 is the app for you." It allows you to create color or black & white pictures. You shoot like you were using the old Hasselblads. It's like going home again. Gotta go...I'm taking pictures with the 6x6 app.