Anyone use an instant messaging app other than WhatsApp? If so, which ones and what were your impressions of them? I've looked at IMO Messenger which has scored quite high but the reviews seem a bit hit and miss, with one person saying their message went to every one of their contacts! Message Me is used by one of my children, and they seem happy enough with it. Anyone use Skype for instant messaging? I don't know of any others so open to comments.