timconwell: Metal only works on A7 and up devices. Apple has no plans (that I am aware of) to support A6 and lower. However, you can make a UE4 game that supports Metal and ES2, and it will choose which renderer to use based on the device and IOS version it’s running on. There are project settings to choose what you want to support. If you support both, there will be both sets of shaders cooked into the data files, so it will be somewhat bigger, depending on your material usage. You don’t need to make two separate builds.
: There is currently an App Store bug that is allowing people to download it on unsupported devices. Hopefully it will be fixed soon. We updated the description to help 
Josh