About us

Crono Care Coach is developed by Pieter-Jan Nefkens, owner of Nefkens Software & Advies. Pieter-Jan has severe asthma himself and long covid since 2020. From this personal experience, Crono Care Coach is built and developed: not by a large company that "just quickly" makes a health app, but by someone who knows the same daily challenges as the users, based on personal experience and the knowledge of healthcare providers who have helped Pieter-Jan recover from being bedridden to where he stands now.

That makes a difference. It means the app is designed with understanding for the limitations that come with severe chronic conditions, such as brain fog, limited energy and rowing with the oars you have, for the frustration of invisible complaints that others don't understand. Every feature is tested with the question: does this also work when you're tired and can't think clearly?

Our philosophy

Crono Care Coach is built with two very important thoughts.

Privacy comes first. Your health data is personal and doesn't belong on a company's servers. That's why everything stays local on your phone. No accounts, no cloud, no data leaving your device unless you say so

Secondly, Crono Care Coach is built to help others in the complex journey to find a certain form of quality of life again and find some peace in it. App development and support cost time and money. That's why we've developed a subscription structure, as low as possible, to finance development, support, and research.


The app is based on proven methods from healthcare: the spoon theory, scoring from 0-10, stoplight methodology, and action plans as they have been used for years with asthma and other chronic conditions. These methods are made practical so you can apply them daily without it costing extra energy.

Giving back to the community

Inspired by other entrepreneurs, we want to actively contribute to research and advocacy for people with chronic conditions and limited energy.

We believe that those who can, should also contribute. That's why 10% of all net revenues go to a combination of research for chronic conditions and patient associations

Not as a marketing trick, but because we know ourselves how important that research is and how much support patient associations can provide.

During 2026, there will be a separate page with more information, here too we believe in transparency.

Contact

Do you have questions, suggestions or want to share something? We'd love to hear from you. Contact us via the contact form or email to info@cronocarecoach.com.

®2025 Nefkens Software & Advies

®2025 Nefkens Software & Advies

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