Just researched SWINGMATE and discovered this -
It is definitely a "putter pal" type ruler, evenly spaced, but which works for all clubs while on WGT.
I can't vouch for its safety (vis-a-vis malware included) or accuracy.
If you can't gauge mater percentages on your own, it may help you. (But WGT has already offered FAQ tidbits about starting at 100%, then watching the avatar intently as ITS swing changes at each 10% increment downward ... 90,80,70... allowing the player to more accurately play the right distances visualized.)
More disturbing to me is that I have scanned several streamed and/or u-tube videos of WGT players who either have "Vulcan" reflexes or some other cheat? programs allowing them to hit the "ding" EVERY SINGLE TIME! That is more likely to explain these ridiculously low scores!
However, that said, I have achieved legend and a lifetime low of 58 without ever resorting to any outside agency, though these longer tees at legend level have me stumped. I don't hit dings very often so I have yet to drop below 69 average at this tier.
But it's all me, and nothing else.