Planning out a new tile job in our utility room. I noticed when our tile guy tiled our bathroom (cause I'm not that brave yet) he bolted a metal beam into the wall horizontally where he wanted to start the first row. That ensured that first bottom row was perfectly straight.
I saw one youtube video where someone mentioned a tile tracker, but all hits on amazon turn up some blue tooth thing

. Any clue what this is called, or what technique the guy was doing in the bathroom? Is that common practice among you all?
I noticed I did not do that when doing the kitchen and drove me nuts, because our old counter was not 100% straight and threw everything off. Live and learn.