The free online calculations have been updated and can now be used on mobile devices. The calculations can either be used embedded in this website or as standalone calculation. The later should be prefered for mobile devices. These include: 

Calculation of Hertzian contact stress for point and line contact

Calculation of fits according to ISO 286

Calculation of geometry data for helical gears according to ISO 21771

Calculation of load distribution within a deep groove ball bearing

The functionality of the calculation was not changed. The layout was adjusted to the current website and scaling was improved for mobile devices.