Xpenser is a great business productivity webapp for iPhone owners. Record and track your expenses on your iPhone with the Xpenser web application. Manage them online or via the iPhone, track and convert your mileage, perform automatic currency conversion, manage multiple clients and accounts, export to your favorite applications, and much more.

Other forms of adding expenses to your Xpenser accout include emailing your expenses, calling and saying your expenses, submitting via SMS, Twitter, IM (Yahoo, AOL, MSN, and Google Talk), search box, and the Web.

Note: This app requires registration. Try with TestiPhone