GlassWire
7.9#1 in personal firewallsFrom $2.99 a monthFree planAndroidWebWindows
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GlassWire 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.
It suits network administrators, ISPs, and teams needing host-level bandwidth graphs or traffic totals. Self-hosted deployments and external applications can use its API.