Another person mentioned that 5MB is a lot for text notes, which is quite true - following the notion.so approach and having a limit of 100 notes or so might be more sensible. I personally just don't like the idea of a time limit on a note taking app, especially when all the other options provide a free quota instead.
That said, your pricing looks just right for me, and the lack of the web app is the main thing stopping me from giving it a try. I really like the fact that you have both folders and tags, instead of just one or the other - that's really the one thing I feel is missing from both Standard Notes and Notion