A waterproof case for your Fitbit tracker is only necessary when you swim or shower with it. Fitbit trackers are splash and accidental submersion resistant. The Fitbit Surge can be submerged up to 50 meters, and the Fitbit Charge and Fitbit Charge HR can be submerged up to 10 meters.
Fitbit is a brand of wearable activity trackers that measure the number of steps walked, sleep quality, heart rate, burned calories and other personal metrics.
Fitbit devices are managed via the Fitbit app, which is available for mobile platforms including Android, iOS and Windows Phone. The app is not available for BlackBerry or Kindle devices.