Here is a smart cube that connects to your smartphone and keeps track of every move as you try to solve the puzzle. The GAN356i Cube allows you to play against others online. It lets you review your time to learn ways to improve as a speedcuber.
The GAN356i runs on battery for 5 hours. Cube Station is available for iOS 9.0 and Android 4.4. With the sensors, battery, and circuit board inside, GAN i weighs only 2.7 ounces.