Instagram rolls out new ability to post to multiple accounts, but only on iOS
However, some Instagram users with multiple accounts, who are looking to keep these accounts as original as possible, will probably don't bother with the new feature. Still, the ability to post to multiple accounts could prove very useful for businesses.
In order to take advantage of the new feature, simply choose the photo or video to post, and you'll be shown the Instagram composer screen for adding captions and tags where you'll be able to choose on what accounts to post your content.
Unfortunately, there's no word on a similar feature for Android devices, so we'll just have to wait and see what Instagram plans for these users.