At CES 2019, Anker showed two new wireless chargers that can charge two devices at the same time.
Anker Power Wave+ Dual Pad can charge two smartphones simultaneously. It supports both Samsung 10W and Apple 7.5W fast wireless charging protocol. The input is 12V 3A. It is Qi certified and is able to wireless charge through phone case.
Power Wave+ Pad With Watch Holder can charge a phone and an Apple Watch at the same time. However, an official Apple Watch Magnetic Charging Cable is required. There is an internal USB-A port to power the Apple Watch charging cable. The phone charging pad has identical output as the Power Wave+ Dual Pad.