GlassWire
7.9#1 in personal firewallsFrom $2.99 a monthFree planAndroidWebWindows
VisitGlassWire suits people who want to monitor network activity on Windows or track app data use on Android. The free tier may fit users who need only short-term history; longer histories are listed with the paid plan.
vnStat suits users who want console-based historical traffic summaries for one or more network interfaces. It is not an application-level monitor, and its estimates cannot predict traffic peaks.