A:AnswerI have a google pixel xl and I had to remove my case for balancing purposes only... not sure about the iphone X but I would think you have to do the same thing...
A:AnswerDepends on the overall weight of the 7 with the battery case attached. If its too heavy, then you wouldn't be able to balance the gimbal.
Best way to check is to walk into a best buy with your phone and battery case and try it out on a demo unit. The gimbal does allow for decent sized phones to be used, but it really depends on weight.
