Inventory Scheduling and Service Documentation Management is a fully integrated mobile app to streamline scheduling the service, managing parts inventories, documenting services provided and receiving payments onsite. For example, the service engineer is on field and inspects equipment damage. The app checks for in-stock spare parts, ordered spare parts and displays estimated dates which allow the service engineers to estimate a time line before even starting the job The web application routes the respective engineers schedules to appropriate devices. Once the engineer finishes a job, the office is automatically notified. Work orders can be attached to service calls. Once the service call is complete, the engineer can get a digital signature from the client and the document can be transmitted to the office database. The app can receive payments using credit cards when applicable.