Hi Wendy Hutchinson. You may update your credit card by: (A) Navigate to grokker.com (can't be done through the app), (B) Navigate to "Account Settings" (C) On the lefthand side, under "Manage Payment Method", you may click on "Update Payment Method". (D) Follow the instructions on the remaining screens.

If you still need help, you may contact us at support@grokker.com.

HI GROKKER - MY CC INFORMATION HAS CHANGED AND YOU WILL NOT BE ABLE TO CHARGE MY OLD CC number . Please advise how I contact you with a new nimber as I could not find anything on your website about payment.