Think I implemented a unique feature in my feed reader

I went through a burn out and spent the last three or so years without working on a development project of my own, then something clicked last month and I started enjoying it again. The result of that was a new add-on for Firefox called BlogCat that is a feed reader with some blog posting features as well. It is quite neat and even though I am the primary audience for it, it is the reader I want, it has some few fans already. The problem is that it is basically done, I'm enjoying working on it but I kinda done all the big features I wanted already, which is when I started thinking about novelty features.

As a WebExtension, BlogCat does not work on mobile. It could work on Firefox for Android with some tweaks but I'm using iOS so I wouldn't even have a proper way to test it. For the moment, I'm using another reader on my iPhone and iPad, the venerated NetNewsWire. It is a good app, it always been a good app.

And that is when a problem surfaced on my radar: how to keep the subscription list between different feed readers in sync? I will often subscribe to new sites while browsing the web on my desktop. BlogCat page action button makes that convenient. Occasionaly, I'll subscribe to a site while browsing on my phone or tablet, but that is a bit more rare.

That is when I implemented OPML matching. Basically what it does is make sure you're subscribed to the same websites on multiple apps by comparing BlogCat's own subscription list to an exported OPML file from another app.

After comparing both lists, it allows you to subscribe to the missing websites in BlogCat and it generate another OPML that can be imported in your other app with the sites that other app is missing. That's it, a simple feature but super convenient. I'm not sure any other feed reader has the same feature, maybe they do, but I think it is something other apps should implement.

I'm super happy with this feature. It is simple and easy to use and makes my life much easier using multiple apps. I'm wondering what other cute niche features I'll dream about next.