There is a bracelet that turns every impulse purchase into a literal jolt. You set your budget limit in an app and, if you go over it, the device responds with a mild but direct electric shock.
Behind the idea is pure psychology: associating the pain of overspending with a real physical sensation, so the brain learns to stop before touching the card again. Amazon sells it, and demand has already turned it into a trend.
Some call it the salvation of their bank account. Others wonder whether it is necessary to go to this extreme to control a simple spending habit.