I think I saw synchs with a karmic, but they were… kind of harsh, like a warning rather than a guide, and no downloads.
I don’t think false twins exist. What people call that is usually just a karmic relationship they’re confusing for something deeper. Kind of like just calling your ex or your first boyfriend a false twin flame just because they weren’t your real twin flame. You only have one (and most of us don’t even have that), so technically by this logic almost everyone on Earth is a “false twin flame”.
Karmics should be avoided but I think it can be hard to spot signs for that, so focus on the signs that you met your true twin flame instead. If you don’t see those signs, this isn’t the one.