Bookme Pro has 6+ online payment options integrated, no need to purchase any add-on. Go to Bookme Pro Menu > Settings > Payments and enable the payment option by entering necessary credentials.
Bookme Pro support following payment gateways:
WooCommerce setup is more complex than any of the other payment gateways. Customers redirect to WooCommerce cart page for payment processing. Read this article for WooCommerce setup.