For developing custom applications that integrate with SAP S/4HANA Cloud Public Edition, SAP recommends using tools available on the SAP Business Technology Platform (BTP).

SAP Business Application Studio (A) is the standard cloud-based Integrated Development Environment (IDE) for professional developers. It is specifically designed for creating Fiori applications, full-stack applications using the SAP Cloud Application Programming Model (CAP), and other extensions for SAP solutions.

SAP Build (D) is SAP's low-code/no-code (LCNC) application development portfolio. It empowers both citizen and professional developers to rapidly create and extend enterprise applications, automate processes, and design business sites with visual, drag-and-drop tools, facilitating quick integration with SAP S/4HANA Cloud.

B. SAP Cloud Portal Service: This service is used to create and manage business sites and launchpads to access applications, not for developing the core application logic itself.

C. SAP HANA Cloud: This is a database-as-a-service (DBaaS) offering. While a custom application might use it for data persistence, it is not a tool for application development.

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1. SAP Help Portal - SAP Business Technology Platform Documentation: "SAP Business Application Studio is a cloud-based development environment for building applications for the intelligent enterprise... You can use it to develop

test

build

and deploy different types of applications."

Source: SAP Help Portal

SAP Business Application Studio

"What Is SAP Business Application Studio".

2. SAP Official Product Information - SAP Build: "Create and augment enterprise applications

automate processes

and design business sites with drag-and-drop simplicity. SAP Build is a low-code solution that accelerates development and automation with integration to SAP and non-SAP systems."

Source: SAP.com

Products

"SAP Build".

3. SAP Help Portal - SAP S/4HANA Cloud

Public Edition Extensibility: The official extensibility guide for SAP S/4HANA Cloud Public Edition outlines the side-by-side extensibility approach using SAP BTP

where both SAP Business Application Studio and SAP Build are key development tools.

Source: SAP Help Portal

SAP S/4HANA Cloud

"Extensibility Guide"

Section: "Side-by-Side Extensibility".