Cost Tracker is an android application that will help you to easier track your cost/spending money. Steps to use it:
Add and save your transaction inserting description, price, and your buying time.
You can see your transactions history and also you can update or delete it.
You can see all your transactions history in chart mode. It has 3 filter, they are daily, monthly, and yearly
The awesome thing we have here is we can set our budget by weekly or monthly
You can also see the budgets history you ever set
You do not need to always open your app to see your remaining budget, because this app also provide the widget about current budget information