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.
I was big into custom ROMs 10 years ago (I had a Nexus 4 at the time) and loved trying beta software. That’s when I found out Laurence was working on a big redesign. I think it was Holo back then? That’s when I bought the Dev version and I haven’t used another app since.