In order to update BodyFast to the latest version:

iOS:

 + Visit the App Store
 + Tap on "Updates" (bottom right)
 + Scroll to the BodyFast app and tap on "Update"
 + BodyFast will be updated now

Android:

+  Visit the Google Play Store
+ Tap on the menu, then tap on "My Apps and Games"
+ Scroll to the BodyFast app and tap on "Update"
+ BodyFast will be updated now