You can invite/refer a friend to Blinkist in the following way:
1. Open the dropdown menu by clicking on 'You'.
2. Click on 'Invite Friends'.
3. Share your personal referral link with your friends or enter their email addresses to send them an invite. For every direct sign-up through the link, your friend will get an extra week of trial access and you'll also get an extra week tacked on to your account if you're a basic user.