Besides being able to make real time calls, the application will let you leave audio messages to any of your contacts for them to receive them as they become available. This way you can use Zellos as a messaging system, leaving notes for our friends our even ourselves.
The application, in any case, will show you a list of your contacts with everyone who is online and is able to establish communication cchannels with each of them at any time.
Zello Walkie Talkie is a very useful tool by which any user will be able yo communicate with another without needing to spend a euro. Also, it offers a quick and simple solution to leave audio messages to any friend.