Please note:It's not possible to redeem a discount code on an existing subscription, only on a new one.
Here's how to redeem a discount code on a new subscription:
Navigate to www.blinkist.com/nc/choose-plan and scroll down to choose which plan you would like to upgrade to.
If you're not logged into an account already, you will be asked to create a new account. If you do have an account already, you can just log into your existing one by clicking on "Already have an account?" at the bottom.
Click on "Have a discount code?"
Please note: if you don't see the field to enter your discount code, check if a discount is already applied to your order in the check-out page. To replace an existing discount, just click "Remove" right next to it, and the "Have a discount code?" link will reappear.
Enter the code and click the "Apply" button that appears to continue with the checkout.
Done, you've successfully redeemed your discount code. It will be automatically reflected in the charge!