Mobile app idea: Tabexpenses

In these times of rising inflation is it is very important that people keep a tab on their expenses . While it is quite easy to track and manage big and huge expenses, it becomes a pain to keep a close eye small petty expenses. So here is my mobile app idea Tabexpenses where in a person can key in his daily expenses as and when they occur.
This application can be further advanced to make it store data over a period of time and allow user to compare statistics like amount of expenses over different weeks, months or even days.
Also if the app can provide little tips on where to minimize expenses, it would be great help to an average middle class Indian. So this app will help you keep complete tract of where your earnings are going, where you are spending and where you need to cut down.
I ve heard such apps do exist but most of them only track your expenses, what iam asking for is an intelligent app which can actually help you simplify life and act as a finance planner .
This app will be best suited for mobile phones as people today have access to mobile phones atleast 90% of the time while spending.