Hello I need a doser, and have heard great things about your products. I need a 3 head stand alone unit and was wondering which model you would suggest. I don't yet have a controller, and am currently not able to get one. I am interested in the Profilux4 but that is not going to happen any time soon unfortunately. If it needs to be programmed via PC or smart phone I am an apple user so needs to be iOS compatible. Any recommendations? Thanks for your time.