How To Integrate Payment Gateway In A Mobile Application

09 / 06 / 2023

Mobile e-commerce sales account for a large chunk of total sales for many businesses worldwide. Thus, businesses are now rightly focusing on providing their customers with a seamless mobile shopping experience. Accordingly, integrating a reliable payment gateway has become an essential component of any good mobile sales strategy.


A well-integrated payment gateway streamlines the checkout process and ensures secure, fast, and convenient transactions for customers. In this blog, we discuss the key steps in integrating a payment gateway into your mobile application and highlight some best practices to enhance your customers' overall experience.

Choose the Right Payment Gateway:

Before you can integrate a payment gateway into your mobile application, it is important to choose a provider that meets your business requirements and aligns with your target audience's preferences. Factors to consider when selecting a secure payment processing gateway include:

  • Security and compliance: Ensure the payment gateway adheres to the highest security standards, such as PCI DSS compliance, to protect sensitive customer data and minimise the risk of fraud.
  • Supported payment methods: Look for a gateway that supports a wide range of payment options, including credit/debit cards, mobile wallets, net banking, and UPI.
  • Transaction fees: Analyse the fee structure, including setup, transaction, and maintenance fees, to ensure it aligns with your business model and profitability goals.
  • Compatibility and integration: Make sure the payment gateway is compatible with your app's platform and offers a seamless integration process with minimal downtime.
  • Customer supportA reliable customer support service is essential to resolve any technical issues or queries that may arise during the integration process or later on.

Obtain API Keys and Documentation:

Once you have chosen the right payment gateway for your mobile app, you will need to create a merchant account with the provider. After your account is approved, you will receive access to the payment gateway's API keys and documentation. The API keys are used to authenticate and authorise transactions within your app, while the documentation provides detailed instructions on how to integrate the payment gateway into your app's code.

Integration Process:

The integration process varies depending on the payment gateway provider and your app's platform (iOS, Android, or cross-platform). However, the general process involves the following steps:

  • Add the payment gateway's library to your app's project: Most payment gateways offer a library specifically designed for different platforms. This makes it easier to integrate the payment gateway into your app's codebase.
  • Configure the payment gateway settings: You will need to configure the payment gateway's settings according to the instructions provided in the documentation, including entering the API keys and setting up the necessary callbacks.
  • Create the payment interface: Design a user-friendly payment interface that allows customers to enter their payment information and complete transactions with ease.
  • Implement the transaction process: Follow the instructions in the payment gateway's documentation to implement the transaction process which includes handling authorization, payment processing, and transaction response.

Testing and Debugging:

Before launching the integrated payment gateway in your mobile app, it's essential to thoroughly test the system to ensure it functions correctly and securely. Most mobile payment integrations provide a test environment (sandbox) that allows you to simulate transactions and verify the integration. During the testing phase, be sure to test different payment methods, transaction scenarios, and error handling to ensure a smooth and reliable user experience.

Going Live:

Once you have successfully integrated and tested the mobile payment system in your app, it is time to go live. Replace the test API keys with the live API keys provided by the payment gateway and publish the updated app to the app stores.

The Bottom Line

Integrating a payment gateway into your mobile app is essential for a seamless and secure shopping experience. It is important to stay updated on security standards, best practices, and emerging trends to stay competitive and meet customer needs.

Worldline is a reliable payment solutions provider that offers various payment options, robust security, seamless integration, and excellent customer support.

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Worldline India Editorial Team