Posture Correction Wearable

A slim, clip-on wearable that sits between the shoulder blades and gives a brief vibration cue whenever posture drifts out of a calibrated neutral range -- the same proprioceptive-feedback mechanism studied in postural-retraining research, not a brace that forces a position. Pairs with a companion app that tracks alignment trends over weeks rather than single sessions. Machine-washable strap, multi-day battery, no adhesives to replace.