All you’re gonna find here is blind defence of Sync. I used it for Reddit and it was amazing, but honestly, the Lemmy app isn’t worth it. Voyager is great if you’re looking for an alternative. It’s free and it’s maintained with updates almost every week.
The point is that method doesn’t work for the feediverse where things are constantly updating. It’s ok to expect that an app is maintained, especially when asking that high a price. I don’t get all the blind defence people have for Sync. It’s a highly priced app for a platform that’s entirely free and there hasn’t been an update or peep for months. It’s ok to question it. People would be for any other app.
Honestly, you should cut your losses and just move onto another app. You can always see if an update comes in the future, but for now there are plenty of good free options that are being maintained.
If you want something short and easy, try Elder Race. It’s a novella, but very well done. The good thing about him is that he’s so prolific, there’s a lot to choose from.