I build the small thing the platform should have shipped, and I measure what everyone else guesses at. Windows apps, terminal tools, and a few write-ups where the numbers come from records rather than recollection.
Something to install, something to type, something to read. Each one has its own site with screenshots, install steps and full documentation.
No dashboards, no accounts, no background services you didn't ask for. A tool should do the one thing its name promises.
Nothing is collected or phoned home. What runs locally stays local — the only network call is the one you configure yourself.
Where there are numbers, the inputs are yours to change and the method is written down. A model you can argue with beats a figure you have to trust.