That is a nice tool. I certainly think the graphs are visually appealing. I do respect the $39 upfront fee as opposed to (yet another) subscription service.
However, personally, I don't think I would purchase a subscription or an upfront license unless the app could provide something more... perhaps some way to further customize the image or fonts. For the most part, aesthetically pleasing graphs are not a major pain point for me especially when Excel or Python can generate something "good enough." If the objective of the app is to provide better visualization for casual users, perhaps some clustering or dimensionality reduction features (e.g. tSNE) might deliver value. Error bars would certainly be nice too. Just some thoughts.
Overall, I think you made a very visually appealing app that does what it says it does.
However, personally, I don't think I would purchase a subscription or an upfront license unless the app could provide something more... perhaps some way to further customize the image or fonts. For the most part, aesthetically pleasing graphs are not a major pain point for me especially when Excel or Python can generate something "good enough." If the objective of the app is to provide better visualization for casual users, perhaps some clustering or dimensionality reduction features (e.g. tSNE) might deliver value. Error bars would certainly be nice too. Just some thoughts.
Overall, I think you made a very visually appealing app that does what it says it does.