App Admin - A tweak for the app store that allows you to downgrade your apps to any previous versions still hosted by Apple. I've been using App Admin for about a week, and have found it quite useful. For example, I always hated using the Facebook app due to it's mandatory Messenger counterpart requirement, along with horrible battery killing background usage. After I deleted the FB app, I re downloaded the app, but this time downgraded to a lower version (10), which has the older interface along with built in Messenger. However, I haven't tested the background usage yet. No problems so far with this free tweak with any others I have installed. Hopefully this app works for you too!