As part of Instagram's most recent platform update, third-party applications will be no longer allowed to present a user's Instagram feed, a significant change in policy that'll affect numerous mobile applications which pull Instagram feeds.
Going forward, they'll be shutting down services and apps that offer auto-following, liking or commenting.
Photo-editing apps that show only individual Instagram photos won't be affected by this change. All apps must comply by June 1, 2016. The new policies and reviews will go into effect for new apps starting December 3, 2015.