Expense manager

Offers in-app purchases. Manage your expenses directly on your smartphone. Easily keep track of your finances. This app allows you to record your expenses easily. Optionally you can assign a category to your expense in order to get detailed statistics and helpful insights.

Check your account statements.
Categorize your expenses.
Use a budgeting or expense-tracking app.
Explore other expense trackers.
Categorize your income.

In short, the main reason you should track your expenses is to identify and eliminate wasteful spending habits in your financial life. Moreover, consistently tracking your expenses will help you maintain control of your finances, and promote better financial habits like saving and investing.