There are plenty of indoor cycling trainers that combine with your smartphone to help you get a good workout indoors. The Jacfit JB101 Cycling Tracker takes it to the next level. It connects to your iOS or Android device and records your speed, power, and calorie count. It lets you invite friends for group workouts and communicate through the voice chat function.
Jbike lets you compete with different people across the world in tournaments. It is also possible to schedule a private workout party with your friends. The Jbike Cycling Tracker is easy to install and lasts up to 700 hours on battery.[where to get it]