I solved my problem by using the icloud. First I provided the update to both the application by doing following changes.
I used "key value store" icloud option and stored some setting on icloud just need to make sure here "iCloud Key-Value Store" value in .entitlements file (which was automatically created by XCode) in both the application is same for both the application. The setting stored here is accessible to both application and depending on the setting I identified the user and gave access to specific functionality.