From the Member App:

• Tap your profile picture in the top left corner.
• Select Payments.
• Tap on the card you want to replace.
• Enter your new card information.

From a Computer:

• Log into your Glofox account on the Schedule page.
• Click "Profile" in the top right corner.
• On the left-hand side, locate Card Information.
• Delete the old card.
• Add your new card details.