A:AnswerIt is a generic usb-c charger and works great with apple iPhones and Macbooks, both with sync and charging cables. I dont think any USB-C charger is certified by apple because it is universal technology
A:AnswerYes, it will work. There's logic between the two to ensure your phone won't attempt to pull more wattage than the brick can supply. And this only matters if you are using the USB C port. If you use A to C, the port only puts out 12W anyway.
