You only need to prepare one single original image file for all the icons. After that, just add it into Icon Resize. 16 types of PNG files are exported each in an instant. And you can email all the images or AirDrop them to your Macbook and other iOS devices. 57*57 114*114 40*40 80*80 87*87 60*60 120*120 72*72 144*144 76*76 152*152 29*29 58*58 50*50 100*100 180*180 167*167 36*36 48*48 96*96 Icon Resize will accelerate your app development!