The company Giiker came up with the first ever Bluetooth cube sometimes in 2018. Currently there are 5 versions you can buy on eBay, Aliexpress etc. and some selected stores around the world. All versions are supported by CubeSmith, but I recommend buying the latest versions (i3S and i3SE). One cube is enough for most of the effects, however, the real killer is the cube cloning effect, for which you will need 2 of the bluetooth cubes.
Xiaomi also came out with a bluetooth cube, called the "Xiaomi Mijia Magic Cube". Currently this model is my favourite of all available bluetooth cubes, see details below.
UPDATE: support for the GAN 356i and GAN 356i Play will be added soon!!!
Xiaomi Mijia Magic Cube
As I mentioned above, currently this is my favourite bluetooth cube. This bluetooth cube has a replacable button battery (1632) therefore it has no charging holes. The body of the cube is black matte plastic, and the stickers have nice pale colors. You can re-sticker it if you want a more authentic look. The cube goes to standby after 15 minutes if not connected, but stays connected forever once you use it. I recommend buying it on Banggood or Aliexpress, it only costs around $17. I recommend ordering 2 cubes at once. :-)
This is the previous version, almost identical in every detail to the 2019 version. Also recommended to buy!
Giiker Supercube i3SE (2019)
This is a new version that just has been released with the latest firmware. It has a cute looking new design... other than that, it is identical to the 2019 version of the i3S in every aspect.
Giiker Supercube i3
I think this version came first, and it's the cheaper version (sells for $30-40). It has a unique color set, so you might have to re-sticker it... although my app supports this color set as well. :-)
Giiker Supercube i3Y
This model also has a strange color set, and I think is more rare to find... all other functions are the same, it just needs to be re-stickered.
See it in action...
What users say
"CubeSmith is the greatest piece of Rubik magic ever released."
"Benke has smashed the rubix cube genre into a new dimension, you literally need no cube experience to do miracles. Absolutely love this app!"
"CubeSmith has opened a new dimension in Cube Magic."
"My friend, this application is the best cube magic I've seen and done!!! OMG, wooooow... With all honesty this is insane, a true magician fooler. Every cube magic on the market is childs play compared to this."