<p>It doesn’t sound too practical to me. Suppose that you did want this person to be able to contact you, to see if further interest could be sparked…but you don’t want them to have your number…this seems like a fairly good option, but what if this person doesn’t already have “Mango?” Do you now have to tell them what the situation is…that you want to talk to them again, but don’t want them to have your number yet…so “hey, download this app so we can talk without having each others numbers yet.” That seems slightly offensive to me.</p>
<p>It’s an interesting idea in principle, but the implementation of it seems a bit impractical.</p>
<p>Personally, I’d have no interest in it. I’m not shy about giving people my phone number. If they aren’t comfortable giving me theirs, then it probably isn’t going anywhere anyway. There’s always facebook too. It’s more or less the same principle as what you’re getting at with this app.</p>