The application consists of four parts. The first part is Demo- the free part. Level 1, 2 and 3 are approximately one US dollar each. You can pay by credit card or by reflecting it on your bill. For prepaid lines, the fee is deducted from the money.
For in-app purchased subscriptions, no extra payment will be requested when the application is uninstalled and reinstalled. You can use your subscription by logging in with your previous subscription, and selecting the restore purchases option in the “Purchase” menu.