Yes, Hardness Converter is completely free and it doesn't have any in-app purchases or subscriptions.
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Hardness Converter is free.
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This app has everything most engineers could want regarding hardness conversion. The built-in roundness correction is also a nice touch. The only deficiency I can see is that the Knoop and Vickers hardnesses are not explicitly stated as macro- or microhardness, although that is the case for ASTM A370 and I can't be too mad about that.
Great work! Really nice and handy app.
Installed the app this morning and have already been using it often. Very handy.
I was disappointed because the conversions did not match the values of the Wilson chart.
Nice to have conversions quickly and easily available.
Very useful conversion tool
This is the best damn app ever!! Now I just need to start writting code for hardness systems. Nice work !!
