Any idea?

Whisper is always a loud marketing trick. And whisper is always a passive way. The best way to promote inLeo is not to actively promote it. Just make it a part of your daily life, a culture in your family which could potentially translate into a culture of society.

We have so many good things in inLeo to shares with out near and dear ones. Whatsapp is almost a thing in every household, and it does not have to promote itself. Similar thing we can do.