Mine is originally using Baconreader while in the dorm community bathroom doing a deuce and seeing a mention of Sync. Installed and instantly became a user. Later on I had a problem with the app because I was running beta Android. Reached out to the dev and after a few fix attempts an update was posted that fixed the issue. To get that kind of support is rare and is why I have continued to stand by Sync all these years.
YouTube has already been helpful to a degree. Sometimes I'll open their AI summarize and it will give all the details along with timestamps. There are videos where I saw the summary and passed on watching because the video was mostly filler material.