Diane, you can absolutely purchase the Premium Monthly plan, and pay by month. The cost for this would be $14.99/month, and you can cancel at any time. Hope this helps!

Hi Diane - thanks for reaching out to us! This page details the Grokker Premium Membership: grokker.com/membership. The cost to upgrade to Premium once your Free Trial has expired is $9.99/month ($119.88) billed annually, or $14.99/month billed monthly. If you have any more questions, feel free to send an email to support@grokker.com!