Yes, the device is fully compatible with Android and Apple's IOS system, Huawei smartwatch will support Apple's ios 8.2 and above systems and Android4.3 and above versions of mobile phones.
There is no problem with using the charging head of Huawei mobile phone and occasionally using the charging head of other brands of mobile phones. The charging base of Huawei watch3 is dedicated and cannot be used for other watches, but the interface of the cable is also a USB interface, and when buying a watch, it is only a charging base without a charging head, so the charging head of the mobile phone can be used.