View heading degrees from your device sensors in the browser with optional true north estimation for simple navigation checks.
Measure environmental noise levels in your browser using the microphone, with live dB readings and basic calibration while keeping all audio local and private.
Measure on-screen distances in pixels with optional calibration to cm/mm/in using fully local processing in your browser with no uploads.
Drag two rays to measure angles on screen, with both primary and reflex angles shown, all computed locally.
Estimate battery runtime from capacity, voltage and load. Supports mAh/Ah/Wh, efficiency and usable capacity.
Estimate tree age from DBH or trunk circumference using growth factors. Local processing.