Focus on the pronunciation of installer
English definition of “installer”
/lɚ/ noun [C]
› IT a computer program that helps you put software onto a computer: The latest version of this software has an improved installer with better junk mail filtering.
› someone whose job is to put furniture, equipment, a machine, etc. into the correct position and make it ready to use: The expert car seat installer said parents often try to install the seats themselves, but often don't do it right.