The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Nate Klein:
Clarcity Travel & Expense for iOS is a fast and easy way to create and approve expense reports while you are on the go. Just log in with your Clarcity user name and password, describe your expense, take a photo of the receipt, and throw the receipt away. The new expense is automatically added to your Clarcity report. The Clarity app can also track mileage using your phone's GPS and add the reimbursable amount to your expense report. Last but not least, the Clarcity app is a convenient way to approve expense reports. See receipts and detailed descriptions for each expense, write notes to your employees if changes need to be made, and approve entire reports with one click.