App-to-App Payment

• The partner app must undergo and successfully pass penetration testing conducted by an independent, certified third-party security assessor.

Reliable and Efficient: The Power of App-to-App Payment

In today’s fast-growing digital ecosystem, businesses demand payment solutions that are fast, secure, and seamlessly integrated into their daily operations. App-to-App Payment provides a modern, frictionless way for partner applications to directly trigger KPOS for payment processing—without the need for physical peripherals or complex setup.

With both the partner app and KPOS installed on the payment terminal device, App-to-App communication enables instant handshakes between applications, ensuring smooth data transfer and reliable transaction execution. This approach delivers a streamlined payment experience that is ideal for mobile-based services, on-the-go businesses, and environments where convenience and efficiency are essential.

By eliminating external dependencies and enabling direct interaction between applications, App-to-App Payment empowers businesses to enhance their workflow, reduce integration overhead, and deliver a fast, consistent, and user-friendly checkout experience.

Visual Overview

The following visual overview illustrates the entire Kayaaku POS via App-to-App process, showcasing the sequence of interactions.

Card Payment

Expand for Detailed App-to-App Card Payment Process

Step 1 : Open Partner App

Customer opens partner app.

Step 2 : Customer Select Products

Customer selects items from partner app.

Step 3 : Customer Make Payment

The payment terminal device will display the amount set from the partner app and customer can make payment on the payment terminal device by:

• Tap card at the top of screen.

Step 4 : Validation of Payment

Once the transaction is successful, a receipt will be displayed on the payment terminal device.

QR Payment

Expand for Detailed App-to-App QR Payment Process

Step 1 : Open Partner App

Customer opens partner app.

Step 2 : Customer Select Products

Customer selects items from partner app.

Step 3 : Customer Make Payment

The payment terminal device will display the amount set from the partner app and a QR code, customer scans the QR code and proceeds with payment.

Step 4 : Validation of Payment

Once the transaction is successful, a receipt will be displayed on the payment terminal device.

Kayaaku POS via App-to-App

Process Flow Diagram

The diagram below provides a more detailed visual of the Kayaaku POS via App-to-App process, mapping out each step:

Process Flow Table

The table below breaks down the Kayaaku POS via App-to-App process into detailed steps, showing the specific interactions between the Customer, Merchant and MyXaaS:

Step	Sender	Receiver	Process
1	Merchant	MyXaaS	Merchant sends payment request to MyXaaS.
2	MyXaaS	Customer	MyXaaS presents payment screen.
3	Customer	MyXaaS	Customer makes payment.
4	MyXaaS	Customer	If the payment is processed successfully, MyXaaS displays payment receipt.
5	MyXaaS	Merchant	MyXaaS sends payment response to Merchant.
6	Merchant	MyXaaS	If the payment status is not received, Merchant proceeds to send transaction status enquiry to retrieve the transaction information.
7	MyXaaS	Merchant	MyXaaS returns the status information of the payment.
8	Merchant	Customer	Merchant displays the status information to the customer.