I love apps like these. It's great to see what someone who just started to learn to code can achieve and how well it is accepted by the community. I mean, these simple niche apps have sometimes so much impact to a specific community, because they're solving a specific problem that people forgot (or didn't think) to address.
I'm happy it was received so well because I had a lot of doubts when I launched it. There are still bugs to be fixed and features I want to add but I first wanted to see the response to the MVP before I spent months developing this further.
I suspect the simplicity is what people like about it so much. It only does one thing and has one button so it's easy to use and also very easy to try.
Hopefully this inspires others that also recently started coding that you really don't need to build a super complex product to do well!
Also, there will always be room for improvement and people wo won't like it or demand features, so remember to keep your head up even in those situations and be proud of what you've accomplished.