The ability to lock direction of travel on Android with a press of a button

[Pyrochaos]

I'm not sure if this is possible, but I will recommend it anyway. I was hoping there could be a button on the screen (or in the 1,2,3,4,5,6 task bar or whatever it is called) that I can use to lock the direction of travel on android (like horizontal direction or vertical). I'm recommending this because it would make grinding a little bit easier as I have realized that when I move up and down or side to side I sometimes walk in the wrong direction out of the brush by accident. This occurs due to my fat fingers or when my finger position is not exactly aimed at the direction I wish to travel, so being able to lock the direction with a press of a button would make grinding easier as people would not constantly have to worry about having pinpoint accuracy when moving in any desired direction.