Thank you for your suggestion. In fact, some people have already recommended Joplin to me, but it seems that it was a bit late. Where I am, not many people seem to be familiar with this tool. After being suggested, I tried using Joplin and it turned out to be a good tool. However, you know, I had already started developing Notas a few weeks before, and abandoning it is the saddest part. That's why I initiated this discussion, and you contributed to it.