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 switched to Sync after Reddit purchased Alien Blue. I used the free version for a while. Eventually I purchased the Pro version then a short while after that purchased the Ultimate version. I got way more than my money’s worth in that app considering Reddit was about 60% of my phone use.