What if the test strip result doesn’t match the reference colours?

Use the app’s cropping and alignment tool to refine the photo, or select the closest matching value manually.

More FAQs

What data does the app collect?

How do I change my email address?

Can I delete my account?

Does Fernox have a registered Data Protection Officer (DPO)?

Is Fernox registered with the Information Commissioner’s Office (ICO)?

What should the appearance be of the water inside a heating system?