iPhone Screenshots


This App is designed to enable heating engineers and plumbing professionals to calculate quickly and accurately the size of a central heating installation in order to recommend the correct products and dosage levels to protect and extend the life of the boiler and system.

Applying the results of the calculation will ensure that a system is correctly dosed and the benefits of water treatment fully realised. An under-dosed system may remain vulnerable to the effects of corrosion so for continued protection, check Protector levels annually.

All Fernox products are Nitrate, Nitrite, EDTA and Phosphate free.

What’s New

Version 1.5

This app has been updated by Apple to use the latest Apple signing certificate.

Update to iOS 11.
Performance improvements and bug fixes.

App Privacy

The developer, Fernox, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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