ex-Opti: An Expense Management System.

eX-Opti is a multi-platform expense management system built on the Cloud and hosted on Google App Engine.It can be accessed either through a PC or a mobile web browser (www.ex-opti.appspot.com) or through telephony (Call +91-4466949325). It was built as a part of Desert Hack, a 2 day hackathon. It was also my first Cloud based App venture.
Some of its features are:

• Add expense entries feature-wise.
• View details and analytics of past spendings, over a custom range of days.
• View graphs of category-wise spending.
• A mobile call can be used to update the spendings (for the large user base with no mobile internet in India) - using DTMF.

Technical details of the app:

• Built using Google App Engine, Python, JavaScript and HTML
• Site is optimized for mobile - using jQuery Mobile.
• Uses Kookoo API for telephony support and Google Charts API for generating charts of Analytics.

U can watch the App Demo which we made here:

The project is now hosted open source on Github. Feel free to fork/clone it and develop it further.

https://github.com/redoc2010/optimus-prime