You can finally post to Instagram from other iOS apps
The sharing feature you've wanted for two years is here.
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Ever since Apple introduced app sharing extensions in iOS 8, budding iPhone photographers have been wondering where Instagram's extension was. Wouldn't it be nice if you could share a photo from any app, rather than diving into Instagram and choosing from your camera roll? You're getting that chance today: Instagram has quietly introduced a sharing extension to the latest version of its iOS app. So long as you turn on the extension, any app that supports iOS' official sharing method can send a photo Instagram's way. That's a particularly big deal if you're fond of third-party imaging apps, which don't always automatically save pictures to your photo library.
The addition is overdue, to put it mildly. Android users have had this share-from-anywhere luxury for a while, and numerous other photo-focused apps (such as Flickr) have had iOS sharing extensions for a long time. All the same, it's good to see Instagram fill in a missing piece of the puzzle.