The Alexxandra LLC, a wearable tech startup has designed and built its ever first product which is a detachable heated vest. Alongside with that great product is a custom app (XHeater) that connects to the vest via Bluetooth for the temperature control. It provides an interface that is user friendly and lets its users control the temperature of the vest by using the slider as it ranges from 0-100%. It’s free for download on the Apple store and Google Play Store