Good app, but needs better 6s support and less syncing

I use this app every week for shopping and love the fact that my wife and I can sync our lists and customize items as well as categories. After upgrading to the iPhone 6s, Ive noticed that the app syncs constantly. When syncing on the 6s, it interrupts typing and the screen turns black making it unusable during that time. On the 5s this did not happen so I think the app needs to be updated for the newer phones. Otherwise, I would have given it 5 stars.

Gugkfkdchff about ShopList (Grocery List), v2.11