You can now post photos to Instagram from other iOS apps
A feature that’s considered a long time coming is finally here. Instagram finally has a sharing extension added to its iOS app. Android users have long since had this ability to get photos from third-party photo apps. Gone are the days where you’d have to head straight to Instagram and scroll through your feed just to find that one photo you want to use. So now, any apps that support iOS’s official method for sharing can send the photo to Instagram for posting.
Source: Engadget