Startup Idea : Travel card

So, you are traveling around some farm in India and you meet a bunch of beautiful ladies from Hungary. You talk and realize that they are Heading to Singapore next and you will be doing so too. You want to exchange contacts with person. What are your current methods of doing so? 1. Pen and Paper 2. notepad on smartphone 3. ?? Why not this: Create an app (TravelCard). In this app, you sign up, and input all your details that you would like to share. Then, if you want to share it with someone who has the app, you just need to add the person's unique ID. You can also add this person offline and when you have connection, your phone will automatically retrieve the data and all the information will be synced with your phone. If the person does not have this app (was he living under a rock?), you can also select an option to send your card to him via whatsapp/email/whatever when you have wifi access again.