Software Engineering---on this basis, the improvement

Requirements:

First, we understand this software as a market-ready app that helps kids with arithmetic operations.

From the point of view of quality assurance, what are the bugs that need improvement?

From the user's point of view (think of yourself as a pupil or really ask the pupils to help), what needs to be improved?

From the perspective of the product (software market positioning, promotion mode, profit model, etc.), what do we have to do with the existing software?

From the developer's point of view, what can be optimized in terms of architecture, algorithms, technology implementations, extensibility, code specifications, and so on?

My thoughts are:

1. From the user's point of view: Add a module that saves the questions and answers, adding a function to save and read the history, giving the user a clear understanding of the practice of arithmetic operations.

2. From the point of view of the product: When entering the software, display an ad page with a display time of 3 seconds, and then look for advertisers to cooperate.

3. From the developer's point of view: Use the factory model to refactor the code, in the current code, code structure confusion, the function of each class is not clear, the role of each method is also very vague, not conducive to the extension of the function.

Software Engineering---on this basis, the improvement