Kakeibo is a simple book-keeping application that allows to keep track of your income and expense. Pick a date, enter the amount of money earned or spent and the description (optional), and tap one of the categories to specify what kind of item it is. You can see your money flow in the simple and easy-to-understand list / graph / calendar views. The data will be stored in your device; Your report can be exported to your Google Drive as a CSV file.