Emotion tracking wearables are nothing new. They are getting better all the time though. The award winning Sence is an emotion tracking smart bracelet that can track 64 different emotional states. It uses ECG tracking to track your data.
The device tracks your emotions by listening to your heart beat. You will be able to use the data to track your stress, adjust physical activity, and keep your health on track. The company behind it has been given CES Honoree awards.