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In EasyGPS, switching the coordinate system from WGS84 UTM to GDA 1994 MGA Zone 55 does not change the east and north coordinates at all. This is not correct because MGA94 locations are about 1.3 m from UTM locations. I realize most GPS receivers won't be precise enough for this to matter, but high-precision receivers are becoming more and more common. Also EasyGPS displays coordinates to two decimal digits by default, so those decimal digits should be correct. And having incorrect MGA94 conversions makes one wonder about more important conversions, such as to AGD1984 AMG Zone 55 which can be 200 m different than UTM.