For S/4HANA customers, the SAP Fiori Reference Library provides an overview of the available Fiori apps. In many cases, there will already be a suitable app to meet your requirements, which can be used just by making a few minor adjustments. Alternatively, Fiori apps can also be developed in-house. SAP provides special development tools and libraries as well as reference implementations for this purpose. As an SAP partner, teamative is able to advise you on development and provide expert support during implementation.