The App works against a pre configured SAP ABAP Systems. Custom ABAP Programs exposed as REST Service are invoked from the device to post the Expenses. For a more detialed explnation see the blog
this App to work against your SAP System you need to send email.
1) download and install the app
2) User Name test2test
After Login you can enter the Expense information header and then add Expense Lines - For SAP HR users who input expenses will know the Expense Types and other requested information - After This you can Post Expenses.
After Login you can Slide the Screen for SMS Paper Receipt Option which allows to Text and attach image of the Expense Receipt to your approver