Thanks, I’ll definitely check all that out. However it’s not the seiko i was having problems with. My king turtle actually runs +5s a day. It was the eta 2824 i have in 2 fairly expensive watches.
I was responding more to the possibility of adjustment part of your post, and Seiko was mentioned a lot as well. In any case (no pun intended...) even the least expensive of movements can be adjusted, and if you can get at it and work with reasonable circumspection making adjustments is easily possible; and that app really, really helps. Especially since it does show the beat error as well.