I know this is the FOSS community but I personally recommend inoreader. It has great usability through its keyboard shortcuts and the ability to pull the full article from the website without clutter (similar to reader add-ons).

If anyone knows a FOSS alternative with similar features, I’d like to know.

OSM is one of the sources for this and apparently the plan is for this dataset to feed back into OSM as well

Does anyone mind elaborating why it is/was called sync and what it’s/was used for? Did it sync with anything or is it just another app like Apollo and RIF?