Interesting article about Pip by Tiffanie Wen
"The Pip’s goal is to teach people to control my stress levels by reporting hidden signals from their body that they might otherwise not notice. You play games on an associated app, where the goal is to change these signals and bring your stress down. It’s an example of a “biofeedback” device. While the Pip measures skin conductivity, other approaches in the same vein monitor things like brain wave activity, muscle tension, or what your heart is doing. The Inner Balance Transformation System, for example, is an app that promises to improve well-being and reduce anxiety by giving you a clearer picture of your heart rate over the course of the day. Biofeedback techniques have also been used to help train athletes."