Here is a smart wearable device that lets you train your dog using your smartphone. The PetSafe SMART DOG Remote Trainer lets you send a button on your phone to send a signal to the collar. You get vibration, tone, and 15 adjustable levels of static simulation to teach your dog to obey your commands.
The device works for dogs 8 pounds and up. It fits neck sizes up to 28″. It has a range of up to 75 yards.