How to add notification to my app of cloud db
Welcome Samitha.
This chat app example supplies a time stamp when the chat message is sent. How to: A Family Chat app built with the MIT CloudDB component .
download the example aia and look at the code involving the Clock component. You probably can do something similar. Sorry, you did not show your Blocks so it is not possible to show you how to do this with your app code. It will be easy to add a time stamp. 
What you would add will be something like this:
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