All the features you expect in a simple day to day expense tracking app

[gauthamns]

Hi all,
I'm the developer of One touch expenser app, which has a unique way of recording your expenses with just a touch.

I would like to know all the features one would expect in a simple expense tracking app which would help us track our day to day expenses and keep tab of our expenses. I'm not interested in a full featured accounting app for business and power users but for others who might simply want to note their expenses. Please provide your suggestions.