Learn how to monitor your internet data usage in Windows 10 using the Data Usage system settings.
BitMeter II is an internet data monitoring app that has an interactive UI and makes use of a colored scrolling graph to deliver data usage information based on various metrics.

TripMode: a tool for saving internet data by blocking unwanted traffic.

Mozilla Monitor. Find where your private info is exposed and take it back. We scan data breaches to see if your data has been leaked and give you steps to fix it.