I noticed a typo in the About modal in the sentence "Data colleccted by our hosting provider, netlify, can be found here." "Colleccted" should be "collected".
I liked your work a lot and found it usable with just one problem and that is not having a Dark Mode. If you don't like the app to be dark-mode by default,you can give users a choice of choosing a theme by themselves.
Since, most of the developers now-a-days work with Dark-Mode Editor,extensions for browsers and optional dark interfaces available on the web,i think it would be a nice addition to the app.