Abstract: A watchband with integrated electronics designed to be attachable to any standard mechanical or digital timepiece. The watchband has a flexible circuit board sandwiched between layers of watchband material, allowing for the flexibility of a normal watchband with the electronics capability of a mobile computer and fitness tracker. The watchband has an embedded heart rate sensor, body temperature sensor, ambient temperature sensor, vibration generator, inertial sensors, and wireless communication device. The watchband is powered by a rechargeable battery, which is recharged using a charging port that can be connected to a battery charger.