I'm 6'2" and have had a slouch for years. I've tried the posture strap braces — they work for about 30 minutes, then you forget they're there and slouch right through them until they get uncomfortable.
I'm a contractor, not a desk worker, so I wasn't sure this would work for me. But ShiftGen has helped my posture more than any other method I've tried.
The whole point is to remind you of your slouch so often that you stay aware even when you take it off. And it does exactly that.
Battery lasts days. The app lets you customize everything.
Worth every dollar. Highly recommend ShiftGen to anyone.