Board Thread:Questions and Answers/@comment-28678213-20160830072318/@comment-25404524-20160830074551

Auto-aim like normal tower is the Tier-4 one. Though personally I don't play BTD5 Mobile, I don't like the idea of auto-aiming like a normal tower, as I usually use them to hit against a very specific part of the track, and it would not be nice if there were lots of entries and then the aiming would be inconstant.