Loads a small face-tracking model from the network the first time you open this page (needs internet once, then it's cached). It measures where your nose sits between your eyes and chin — tilt your head down toward your notes and it counts as studying; look up at the screen or step away and it pauses. Calibrate first so it's tuned to your camera angle. Step away for 10 seconds straight and a break starts automatically from your bank. Stay away or keep looking up for 15 seconds without banked time to spend, and the bank starts going into debt until you get back to studying. Need to go without any of that? Hit emergency break — it pauses everything and costs you nothing. Your studied time, bank, and calibration are saved on this device automatically. Nothing from your camera ever leaves this browser tab.