How to see which apps are using up my data?
On your PC you can track the bandwidth usage of the installed applications. There are plenty of applications that have this capability, however, you can't really see what data is used and transmitted on the Internet because it can be encrypted and the chance to decrypt it could be close to 0 or 0. There are Internet Security suites available for installation that can monitor the traffic. In some cases they're blocked because of suspicious behavior. I recommend choosing apps from the following lists posted below: