How to install new app in my Mobile?

I need to add app with my mobile for finding pan card related issues and notification. Can you help me to find the important app about that. I have collect my pan card details in apply pan card online. It is given some of applications and support for applying pan card for me. Just i need to instail the pan card correction related app. If you are getting that specified app means share me here. I am waiting for the reply. Few months before my friend helps for searching my information in mobile and also she was getting that app. One more help is what is best app for finding my pan card details?