To approve expense report using DATABASICS mobile app. Click on Expense Approval To Approve counter on the Dashboard or by selecting Expense Approval from the side slide out menu like below.
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From the approval page select a report and use the following options:
View report Press the 
icon to open the report and to View the details
To Approve / Reject from the approval report queue , use one of the following two options:
Press the Approve or Reject buttons under the report
Or swipe the report from right to left.
Approve a report
Reject a Report
Note: If report has only one line you, will see the Approve and Reject button on the report list screen. If there are more than one expense line in the report, you will need to click on the to view the line details or swipe the line from right to left to to approve or reject the individual lines.
Use 
Press the Notifications icon to attach/e-mail a notification from the approver to an expense report.
Screenshot below highlights the different functions on the approval screen if a report has been opened by pressing
Use filters to search for a report 
Add
Generate a PDF copy of a report
Swipe from the right to the left on the report to add a message to a report
View expense line attachments
View expense line details
Swipe from the left to the right to view the audit history of a report