Most recent devices (tablets and smartphones) are most likely compatible with wireless charging. But if you have an older smartphone, it probably will not support wireless charging.
You need to check whether your device supports the Qi charging standard. If it does, you will only need to buy a separate wireless charger.
Using a wireless charger from the same manufacturer you bought your device isn't mandatory. If your device supports the Qi standard, you can use any wireless charger to charge your device.