Instruments
Working models and measurement tools, free to operate. Each one ships with its methodology — no signup, no data kept.
Catalog
3 instrumentsWebsite speed test
Measure any page's Core Web Vitals — real-user Chrome field data plus a Lighthouse lab run — in one instrument.
MeasurementROI calculator
Total return, annualized return, and net gain from any initial amount, final amount, and holding period.
ArithmeticAd auction simulator
A live generalized second-price auction: drag bids and quality scores, watch rank and what each advertiser actually pays.
Simulation