yeah I thought about that as well. I think I refer to it as bat because I learned the sara grip one first, so I started referring to the ken grip underbird as bat so I could differentiate it. It was my understanding that bat was the older name that people used before underbird. It could very well not be though
I learned both as bat. Just recently I learned that people call it underbird. I still call both bat. It's just a matter of preference, I think.
Ahh. Well that makes sense then. I bought that kendamapp for My phone and they have a lot of videos and I believe they call it bat on there as well.