Can I make a chat room using AppInventor?

I want to make a app where I can see who is online. I can also exchange messages with one person in my contact. Is it possible in App Inventor? If yes then how? Thank you.



probably you can use this:

A Chat Demo with App Inventor 2 and PubNub^TM

This is a group chat. I want to make a one to one chat room. I already have my group chat room.

What I want to add:

When a new user registers himself his data is stored in tinywebDB..and his name and phn no. is added to a list picker.Now the registered person can see the updated list picker.from there he can choose the name of a person.or click over the name to start sending him personal message.We r opening a new screen when clicked on a item in the list picker.that screen must open individualy for every person in the contact list.To choose a new contact for chating we go back to list picker.

Now, I already have a group chat which is using tinyWebDB so cannot add another tinyWebDB in the same project right?. If so, I can add a different tag. But it will collide in "when TiyWebDb1.GotValue".  Is it possible?

you can do a lot with PubNub, just use a separate channel for one to one chat

and concerning your TinyWebDB questions: yes, just use different tags

It would really help if you provided a screenshot of your relevant blocks, so we can see what you are trying to do, and where the problem may be.