iKnow! Pro Member is one of the user types. There are "Trial user" and "Pro member".
We call a user "Pro Member" if he/she signs up with any plan, or uses a coupon to get free study period.
After registering on iKnow! and studying five free trial sessions, you'll have to sign up to be an iKnow! Pro Member to continue studying with our learning applications.
Please see the plan and payment details from the link below.
Payment Details - https://iknow.jp/pricing