SAP Service and Asset Manager is a mobile application which can be used with SAP S/4HANA and SAP ERP and is supported for iOS and Android.

The following video provides an information on the access and operation of SAP Service and Asset Manager.
SAP Service and Asset Manager is a metadata driven application which provides generated code to support multiple platform deployment with a middleware leveraging SAP BTP.
SAP Service and Asset Manager - Features
SAP Service and Asset Manager covers standard features such as Assets (Technical Objects), Measuring Points and Readings, Work Orders & Operations and Work Assignment, Notifications as well as Spare Parts.
Special features contain the Clock In - Clock Out (CICO - allows decoupling of time tracking from the mobile status of a work order or operation, allowing multiple users to start and log time against the same work order or operation simultaneously) as well as support for the Phase Model and the Inspection Checklists.