Learn how to cancel Hardness Converter subscription on iPhone, Android, Paypal or directly.
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Alternative method via AppStore:
1. Granit Engineering Hardness Converter ( ) is a mechanical and metallurgical design application which performs conversions between different scales of surface hardness and tensile strength Rm.
2. It's the free offline version for Android (3.
3. Very quick and easy to use, it's currently available in English and Italian.