Patent ID: 8429223

Claim:
A master electronic device for coordinating a group activity, the master electronic device comprising: a master communication module configured to communicate with a first member communication module disposed in a first member electronic device and with a second member communication module disposed in a second member electronic device; and a controller configured to: generate a synchronization signal for synchronizing playback of a first activity file by the first member electronic device and playback of a second activity file by the second member electronic device; and transmit the synchronization signal to each of the first and second member electronic devices via the master communication module, wherein: the playback of the first activity file instructs a first user of the first member electronic device to perform a first activity of the group activity in accordance with a first parameter; and the playback of the second activity file instructs a second user of the second member electronic device to perform a second activity of the group activity in accordance with a second parameter that is different than the first parameter.