Readkit and Fiery Feed Reader also work the same way as Reeder with possible iCloud syncing. https://Readkit.app and http://cocoacake.net/apps/fiery/.

I am not sure how each of the apps are between one another. For pricing, I think Reeder is one time while Fiery Feed Reader is $15 a year for in app family subscription. Readkit is $10 a year or $40 lifetime.

All three apps are made by indie developers and not bigger corporations.