Sync has a lifetime ad free option. That removes the Google tracking as well, since it’s tied to ads. Subscription it for extra features you probably dont need. Based on comments about reddit sync, it also doesn’t track usage statistics. But that is mostly a guess from my side.
The price is a steep 20 USD, but the app is new and the Dev is well known. You also know what you are getting if you have used Sync before.
I use sync, but I think they still should be FOSS, or at least open source. Just because when anything gets left behind or never fixed, you can take it and patch it up yourself. That includes clients too, lots of good clients that get left behind because Dev stopped and whatever they were interfacing with changed.