I mentioned this in another comment, but I've had to fill in a lot of visa application and extension forms while living in Southeast Asia. I wanted to make that process easier, so this was the first step towards that goal.

I've also worked at companies where we built something similar in-house. So while this is a very niche product, I know there's a least a few developers out there who may find it useful.

Building something like this is also a great way to find new problems to solve. I think even if it's a niche idea or something you're not sure about, it's better to start building something than to wait for the perfect idea.