Sygic & Trakker Nav Pakistan

I want to buy this app from Google Play.

Is it safe to buy from Google play online using Visa card?

yes it is safe

as long as your google account is safe

and if you are not sure , use two factor authentication on your google account

its also called 2 step verification to make your google account safe as a bank's vault

What's the difference between this Sygic and Sygic & Trakker Nav Pakistan? Also, are the maps for Pakistan updated? I downloaded the trial, downloaded Pakistan map. Using a file manager, when I go SDCARD>Sygic>Maps, the folder for Pakistan maps is named "pak.tr.2011.02"; is this the latest map?