CalendarPA supports three major payment providers:
Stripe - Credit cards, debit cards, Apple Pay, Google Pay
Square - Credit cards, debit cards, Square gift cards
PayPal - PayPal balance, bank accounts, credit/debit cards
The payment methods available to your clients depend on which provider you connect. Most major credit and debit cards are accepted through all providers.
You can set prices in various currencies depending on your payment provider's supported currencies. The most common are USD, EUR, GBP, CAD, and AUD.
Go to Settings > Payments to connect Stripe, Square, or PayPal. You can have multiple providers connected and choose which one to use for each booking type.