The Ham Radio; DTMF Keyer/Decoder app is a useful calculator for amateur radio enthusiast (Ham Radio). It calculates using US Statute, Nautical, and Metric units. It is versatile and flexible for your convenience.

DTMF Keyer and Decoder with settings for accuracy

Antenna Calculators

• 5/8th Wave Vertical
• Half-Wave Dipole
• Dipole & Inverted Vee 
• Ground Planes 
• Quad (Cubical) 

Visibility & ERP & EIRP Calculators

• Horizontal Visibility
• Pure ERP and EIRP
• VSWR Loss Calculator
• EIRP Calculator for Transmitter power, Gain, and Power Loss

Area Converters

• Square Inches and Shorter Conversion
• Square Feet & Yards & Meters Conversion

Distance Converters

• Inches & Centimeters & Millimeters Conversion
• Feet & Yards & Meters Conversion
• Nautical Miles, Statue Miles and Kilometers Conversion

Volume Converters

• US/Imperial to Metric Units Conversion
• Metric to US/Imperial Units Conversion
• Inches & Centimeters Volume Conversion
• Feet, Yards, & Meters Volume Conversion

This app features:

• Send your calculations or conversions by email
• Universal App (iPhone, iPod Touch, and iPad)
• Retina Display graphics
• Fast app switching
• Automatically Saves Your Inputs
• Latest version of iOS is supported
• All iPhone screens are supported

No network connectivity required.