BookEasy: The name is simple and conveys the ease of use of the system, while the word "book" directly reflects the core function of billing. Housekeeper: This name conveys the concept that the system can help users manage and record their living expenses through the word "housekeeper". Spending Tracker: This name highlights the system's ability to track spending, while being easy to understand and remember. Wallet Log: combining the words "wallet" and "log", it not only reflects the concept of financial management, but also conveys the message of recording daily expenses. Spending Assistant: This name is warm and friendly, expressing the system's intention to help users easily manage their daily spending. by Luoshen Legend @User630575686848