Wahoo Fitness has announced the Balance Smartphone Scale ($99), a Bluetooth 4.0 body scale. The scale tracks weight and BMI, sending the information to the Wahoo Wellness App or any compatible fitness app to track progress with charts and graphs. Profiles can be saved for up to 16 different users, and the scale’s own internal memory can save up to 130 separate weight readings. The Balance Smartphone Scale is compatible with the iPhone 5, iPhone…