To change the payment method for your Joist plan, please make sure to sign into your Joist account on the same platform/device originally used to purchase your plan.
For iOS devices:
To change your Apple Account payment method, check out Apple's guide for instructions.
For Android devices:
To change your Google Play Store payment method follow Google's guide for instructions.
On the Web (laptop/desktop computer):
Click the Joist Pro tab in the lefthand column, then click on the Update Credit Card button at the bottom of the screen.