'How many people can watch HBO Go at once?': Here's the number of devices you can connect to one account, and how it compares to HBO's competition

· HBO Go allows two devices to stream shows and movies at once.
· You can have up to three registered devices attached to a single HBO Go account. 
· You can check how many devices are currently attached to your account through the Settings menu.
· Compared to rival streaming services, HBO Go is on par with Standard or...