All you do with Tango is free, but you need to be mindful of the data plan consumption if you are using 3G or 4G to make your calls. As an estimate, you can make 450 minutes of video calls using 2 GB of data. There is no possibility to call people outside the Tango network.
What is the benefit of subscribe in Tango?
Tango Subscriptions allows dedicated fans and followers to support and reward their favorite Broadcasters with guaranteed monthly earnings - opening up a new monetization model for Broadcasters to earn from their content!
How do I subscribe to Tango?
0:060:49Subscriptions on Tango! - YouTubeYouTube
Is FaceTime free on data?
FaceTime is Apples video calling service for iOS that uses data, not cellular minutes, to make calls. FaceTime is free because as long as you have Wi-Fi, you can make calls to other iPhone users without incurring fees on your cellular plan.