Can I use SAP Web IDE to develop SAP Fiori apps?

Yes, you can develop SAP Fiori Apps using SAP Web IDE. Web IDE is a web-based, extensible development environment that simplifies the end-to-end development of business applications, such as S/4HANA extensions, SAP Fiori apps, mobile, and IoT. It is used to easily develop, debug, build, test, extend and deploy role-based, consumer-grade apps. Since SAP Web IDE Full-Stack runs on the SAP Business Technology Platform (BTP), it does not require installation and enables you to integrate with other platform-running services, such as SAP Fiori Cloud apps, Git integration, mobile services, IoT services, and more.