Units Plus Converter 2020 IOS (iPhone, iPad, iPod) SWAP units by swiping or double tapping center of label. OPTIMIZED for Retina display  works on inches and new 4 inches screens. Units Plus Converter IOS Features:  Area.  Currency (155 world currencies updated every 15 min.).  Data-computer data (byte, kilobyte, megabyte, etc.).  Fuel-milage.  Length.  Power.  Pressure.  Speed.