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CGM Sensor Drift & Interstitial Lag Simulator

Interactive continuous glucose monitor simulator: watch a subcutaneous sensor's reading lag behind true blood glucose during rapid swings and drift away from it over multi-day wear — then see periodic fingerstick calibration snap the sensor back into alignment.

Medical Technology & Imaging Physics3DModerate60 FPS

A continuous glucose monitor never measures blood directly — its filament sits in the interstitial fluid just under the skin, so its reading both lags true blood glucose during rapid swings and slowly drifts away from it over the sensor's multi-day wear period. This simulator plays a full day of true blood glucose, complete with a meal-induced spike and a later dip, and tracks it with two simulated sensors side by side: one left uncalibrated, drifting further from reality the longer it wears, and one recalibrated on a periodic fingerstick schedule that snaps its baseline back into alignment each time. Adjust wear-time, drift rate, interstitial lag and calibration frequency, or fire an ad-hoc calibration, to see exactly how the accuracy gap opens and closes.

⚙ Under the hood

Watch a continuous glucose monitor's subcutaneous sensor lag behind true blood glucose during a meal spike and later dip, and slowly drift away from it over multi-day wear — then compare it against a periodically fingerstick-calibrated sensor that snaps its baseline back into alignment on every calibration event.

CGMcontinuous glucose monitorinterstitial fluidsensor driftfingerstick calibrationwearable devicesdiabetes technologybiosensor

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install