Hi Jeff,
Welcome and thanks for posting. If you have multiple PCs, you may want to look into GlassWire. Community members have suggested and used GlassWire, so feel free to ask them for tips on using it:
https://www.glasswire.comAs for data monitoring apps for your mobile devices, there are plenty on their respective app stores. I'll defer to our community for their input on mobile data monitoring apps they've used.
-Liz
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