Apps like Duct Sizer

Here are some great alternatives to Duct Sizer by Energy4You :
Ductulator - Duct Sizing Chart
Ductulator - Duct Sizing Chart
★4.1
Duct Calc Elite - Ductulator
Duct Calc Elite - Ductulator
★3.6
Digiduct
Digiduct
★5.0
CookTools
CookTools
★4.0
Miter Bend Layout
Miter Bend Layout
★5.0
TEC Gauge
TEC Gauge
★4.4
Pioneer Official Store
Pioneer Official Store
★4.8
Simple Offset Pro +
Simple Offset Pro +
★3.8
HVAC Sheet Metal Pro Calc
HVAC Sheet Metal Pro Calc
★5.0
Mitered Pipe
Mitered Pipe
★4.4
AQL Calculator
AQL Calculator
★4.4
Simple Calculator
Simple Calculator
★4.3
Unit Converter
Unit Converter
★4.7
Sizing US/CA
Sizing US/CA
★4.6
Square Meter Calculator
Square Meter Calculator
★4.7
TechDeco
TechDeco
★4.7