KIK, Snapchat, WhatsApp ?

[CherryCrush]

After being gone 3 years I feel brand new again lol. So many new ways of contact. I came across a website that allows you to add your Kik, Snapchat, WhatsApp for membership sales. Can someone explain the difference between these 3 apps?
Another question I had is yahoo messenger still used by customers to contact us and perform on? I know Skype seems to be the main one. Any other new messengers I should be aware of? It use to be Yahoo messenger and ICQ lol that was 2002 back in the day.

 

[CherryCrush]

hi.
Yahoo messenger is not used anymore. If there's anything other than skype..idk
Kik is an anonymous chatting app, Snapchat is mostly for photos/videos and Whatsapp is not recommended because it used an actual phone number so they can call you or whatever too so not safe.