KISSsoft recently announced that its first free iPhone app, Hardness Conversion, is now available. This iPhone application easily allows the conversion of hardness values among the hardness test methods according to Vickers, Brinell and Rockwell while on the go. To get the conversion, only one value has to be entered-instantly, the remaining hardness values will be calculated. Additionally, the user can compare different hardness scales. Information about each hardness test method completes this practical and effective iPhone app.