How do you handle different currencies and exchange rates in mobile payment systems?

1 Choose a payment gateway

The first step is to choose a payment gateway that supports multiple currencies and exchange rates. A payment gateway is a service that processes and validates online transactions, and connects your app with the payment networks and banks. Some popular payment gateways for mobile payments are Stripe, PayPal, Braintree, and Adyen. Each gateway has its own features, fees, and integration methods, so you need to compare and evaluate them based on your app's requirements and target markets.

2 Test currency conversion

The next step is to test how your app converts the prices and amounts from your base currency to the local currency of the user. You need to ensure that your app displays the correct and updated exchange rates, and that the user can see the final amount in their preferred currency before confirming the payment. You also need to check how the payment gateway handles the currency conversion, and whether it charges any fees or commissions for it. You can use a currency converter tool or API to verify the accuracy of the conversion.

4 Test payment methods and options

The next step is to test the different payment methods and options that your app offers to the user. Depending on the payment gateway and the user's location, you may have to support various payment methods, such as credit cards, debit cards, digital wallets, bank transfers, or cash. You need to test how your app validates, processes, and confirms each payment method, and how it handles errors, failures, or cancellations. You also need to test the different payment options, such as one-time payments, recurring payments, subscriptions, refunds, or discounts.