About Courses

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We offer [Subscription Course] that provides unlimited access to all games and drills, and [Free Course]. Alternatively, you can also purchase Single drill item.

We offer 7-day free trial

Only first-time purchasers are eligible for a one-week free trial of the Advanced course. Please note that if you have already used the free trial period, you will be eligible for a subscription when you apply for purchase.

Change your course

Thank you for using this application.If you would like to change the course, please refer to the instructions collectively below.

• Subscription course
• Free Course

Change to subscription course

1. On the home screen, tap the key icon.
2. Follow the instructions to the app store purchase screen.
3. Once you have entered your purchase information, your subscription will begin.

Change to free course

Free members do not need to register or complete any other procedures.

Cancellation of the Advanced course cannot be done from this app.Please cancel in the app store where you purchased the app.

Cancellation of the free period can also be made from the app store.

Please click here.

You can continue to use the paid subscription until the next renewal date. If you wish to cancel your subscription, please do so at least 24 hours prior to the renewal date. You can check the renewal date when you cancel your subscription in the app store.

Other questions

For other questions, please check here.

• I want to check current purchase information
• Will there be any charges?
• Why I can play a paid game even though I haven't purchased it?
• I want to cancel the Advanced Course.