To full enjoy all the features of Langmate, you may need a VIP subscription plans (see what is VIP).
If it applies to you, you will see special screens and popups within the app.
To check if VIP subscription plans apply to you:
> go to My Page
> go to Settings
> scroll down and locate My subscription
If see this menu, you are eligible to VIP subscription plans. You can now select a plan or continue as a free user.