You don’t need a photo crop app to edit your pictures on iPhone or iPad. The Photos app makes it easy to perform minimal edits such as rotating or cropping a picture. If you want to edit a photo on your iPhone or iPad, you could buy a fancy photo editing app. But if all you need are the basic editing functions, you can simply learn how to crop a picture using only the Photos app. Cropping photos on iPhone or iPad takes no more than a couple minutes, then your picture will be Instagram ready. Here’s how to crop pictures on iPhone.