Latitude and Longutude Grabber Android App

We want an android app that whenever first party make a call to second party and if internet is activated on that second party mobile number then location of second party should be visible on first party mobile number. Even if another party did not installed our app on their mobile and only one party installed the app and he she can view other's Latitude and Longitude. It can be done using lat long or i.p address. App should be having the similar features on truecaller also. Similarly this kind of feature is already given on facebook and some other social networking apps in their nearby locations feature. It should show location at city/ state & country level only as well as GPS location. For India, it shud show at state level for mobile numbers and at city, district, state level for landline numbers. Offline support and it shud work even without internet connection. Search & track number locations, std codes & isd codes even without internet. It shud block spam calls.