Wahoo Fitness App

• How Do I Pair a Sensor to the Wahoo Fitness app for iOS?
• How Do I Pair a Sensor to the Wahoo Fitness Android App?
• How Do I Set Wheel Circumference for a Speed or Speed/Cadence Sensor in the Wahoo or ELEMNT App?
• How do I set wheel circumference for my speed sensor with the Wahoo Fitness App (Android)?