Hi Nidhi, you must try 'Auto Stamper App for Photos'. It's a small size app which will help you to add text and logo to the photos you capture by the built-in camera.
I have been using it since a very long time, hope it will help you too! :)
Here is the link to download this app: https://play.google.com/store/apps/details?id=com.ebizzinfotech.datetimestampphoto