If you're looking for a user-friendly finance management app that provides a range of features to help you keep track of your daily expenses and income, 가계부 - HBook is an excellent choice. This app, developed by Streaming File Manager, is available on Android devices and is completely free to use.

One of the key features of this app is its real-time approval SMS entry function. This feature allows users to input their credit card or check card expenses directly into the app by displaying a real-time input window on the user's phone screen as soon as an SMS approval message is received. The app also provides users with a detailed list of daily expenses and income, along with monthly expense summaries and statistics graphs, and annual asset trends.

Additionally, users can edit their expense and income items, delete unnecessary entries, and add new items as needed. The app also has a lock function to ensure the user's privacy, and a data backup/restore function that can be accessed via Gmail account. However, please note that the app's update requires the data reset due to the Google policy change regarding external storage access. Further details can be found in the developer's blog.