How to use the Posture Checker
- Put the camera above your screen facing you, with your head and both shoulders visible.
- Press “Start camera”, sit up straight, then press “Calibrate good posture” and hold for 3 seconds.
- Work normally. If you slouch, drop your head or lean in for longer than your chosen delay, you hear a chime and (optionally) get a system notification.
- Review your good-posture share and alert count, and get up when the break reminder fires.
How does the AI know my posture slipped?
During calibration we record, in your upright position, the vertical gap between nose and shoulder midpoint (relative to shoulder width), the tilt of the shoulder line and the apparent shoulder width. Live readings are compared with that baseline: a head sinking toward the shoulders usually means slouching or looking down; a much wider shoulder span means you leaned toward the screen; a tilted shoulder line means sitting crooked. Alerts only fire after the change lasts for your chosen delay, so reaching for a cup does not trigger them.
Why calibrate first?
Bodies, camera angles and chair heights all differ, so there is no universal “correct number”. Using your own upright posture as the baseline makes alerts meaningful. Recalibrate after moving your chair or screen.
Does it work in a background tab?
Browsers slow down background tabs, but most desktop browsers still allow about one check per second. Keep the page in its own window rather than minimised, and enable system notifications to see alerts while working elsewhere.
Breaks and eye strain
A common eye-care tip is the 20-20-20 rule: every 20 minutes, look at something 20 feet (6 m) away for 20 seconds. For long sitting, standing up and moving for a few minutes every 30–60 minutes is widely recommended. Set the break reminder interval to get a prompt.
Not a medical diagnosis
This tool only nudges habits. It cannot diagnose neck problems, scoliosis or other conditions. If a child consistently sits crooked, one shoulder sits higher, or anyone has neck or back pain, see a doctor or physiotherapist.
Frequently asked questions
Does it record video or take photos?
No. Frames are analysed in browser memory and discarded immediately; nothing is saved or uploaded.
Will a laptop webcam work?
Yes. A built-in webcam above the screen is the ideal position. Make sure the room is lit and your head and shoulders are in frame.
Is it suitable for kids doing homework?
It can help as a reminder. Parents can set it up and review the statistics together. If the camera cannot see both shoulders, move the device further back.
Does it use a lot of computer power?
Posture monitoring analyses only about four frames per second, much lighter than rep counting. CPU use is usually low on recent computers.
Can I wear glasses or a mask?
Yes. Detection relies mainly on nose, ear and shoulder positions. A mask may shift the nose estimate slightly, so calibrate the way you normally sit.