So I’ve been using Touring Plans since 11/2003. I’ve seen a few changes here and there, but the most dramatic was on the website and app for my 1/2024 trip. The planning stages were basically the same as they’ve always been on the website. But the app was entirely different, and not in good ways. I found it cumbersome, difficult to update, and the Disney World app for organizing your day was much more useful - shockingly enough. I was quite disappointed. I’ll maintain my subscription (it’s already paid up) for now. Hopefully the app gets better and more like it used to be.
I, too, prefer the desktop site to the app. However, like most new tech, I played with the App a bunch and got better at using it. It’s got issues, for sure, but still better than just wandering around WDW clueless like most visitors!