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If you want to setup your tracker with your iOS Fitbit app, you just need to follow these steps:
1. Open the Fitbit app
2. Tap Join Fitbit
3. Choose your product
4. Tap the setup option
5. On the next few screens, enter your personal details. This information is used to calculate your basal metabolic rate (BMR), which helps determine your calorie count for activities
6. Enter your name, email address, and chosen password
7. Follow the onscreen instructions to continue
Welcome to the Fitbit family! 
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