I literally just switched from Sync to Voyager on Android last night. So far, I'm enjoying Voyager much more.

Sync was fine, but the developer only pops in once in a great while, then he ghosts for months (or even years). Getting any problems resolved means waiting until he happens to show up again, then hoping he notices your specific complaint.

I managed to get .webm content to display in the app by catching him right before he posted a major update a couple years ago. But he hasn't responded to any other issues I've posted about since.