On your iPhone/iPad:

  1. Go to Settings > [your name] > iTunes & App Store
  2. Tap your Apple ID at the top of the screen
  3. Tap Payment Information (you may need to log into your Apple account)
  4. Then update your credit card or address information as needed

On your Android device:

  1. Open the Google Play Store
  2. Tap Menu > Account > Payment Methods
  3. Find your FitOn subscription
  4. Tap Update