A statement from Nextcloud said Kailona was the first to offer the health and lifestyle data storage alternative and puts people in control over data sharing.
"As EU healthcare providers adapt to new technologies and government requirements, a wave of new apps offer to store healthcare data though business models aimed at monetising the data by, or with, insurance and pharmaceutical companies," the company said.
"Kailona provides open source health information technology to protect people from data exploitation, give them control over their health and lifestyle data, and improve the health of individuals and societies."
Users can utilise the data to gain insights about their own health and securely share portions of their health data with others, including family and friends, researchers (in an anonymous fashion) or healthcare providers.
Nextcloud chief executive Frank Karlitschek said: "Healthcare data is the most valuable, private and most abused kind of information and the vast majority of people has neither the means nor knowledge to protect their privacy or use the data in a productive way.
"The Kailona app is revolutionary in that it massively lowers the barrier and allows normal humans to not only control access to their data, but visualise, augment and benefit from it themselves."