Rebuild in React

About 3 years ago I created It was a technology-driven pet project; I wanted to learn more about NodeJS and needed a project to work on that.
Since then it has been running and there are still users who use this application on a regular basis.

A few weeks ago I again needed a project to learn more about a technology, this time it was React.
I decided to rebuild because it seemed like a good fit for React. It also has an Android app which could be a nice experiment to rebuild in React Native.