Now you can buy the MagSafe Duo charger from Apple, which can charge an iPhone and the Apple Watch wirelessly. The price is at $129.
But you have to take into account that you will need an additional powerful power supply, which is not included in the delivery. Furthermore the charging solution is still a bit slower than a pure MagSafe adapter for iPhone. We already mentioned the details here, which increase the price to around $200.
But as it is with practical travel accessories: they have their price.