Iphone app that is like kik?

[Flame]

I got a message saying that kik is gonna start charging if you're inactive, so i deleted my account.
The problem is other apps like whatsapp n viber require phone nos to communicate with people whereas u just needed to know the person's username in kik.
So are there apps like kik which do not require phone nos to communicate with people (except skype, facebook, twitter)

[Hafsa]

What's app? Viber? Tango? All really good apps except what's app charges.

[Loris]

I have kik too but I haven't recieved this message, I really doubt it's true as the main point of kik is that it's free. Also people used to say whatsapp would start charging if you're inactive but it's been half a year and they're still not charging so I don't think you need to worry. But if you really want other apps there are LiveProfile and Touch.