10. Data Retention
We keep your personal data only for as long as it is necessary to fulfill the purposes for which it was collected. This includes meeting legal, contractual, or research obligations, as well as ensuring the security and integrity of our systems.
Newsletter: if you sign up for our newsletter, we retain your contact information until you unsubscribe or ask us to delete it. For test user registration and communication, we store your email address for as long as we are actively inviting participants or conducting feedback activities — or until you withdraw your consent.
Survey responses, including health-related answers, are kept for a limited period — typically up to two years — to support product research and development. We may retain this data longer only if you have explicitly agreed to extended use, or if the data is anonymized for aggregate analysis.
Breathing sound recordings and facial images are also stored for a limited time — up to 5 years — unless a longer retention period has been clearly stated and explicitly accepted by you. These files are used strictly for algorithm development and are deleted as soon as they are no longer needed.
Basic website usage data collected through tools like Google Analytics is stored for up to 14 months and is anonymized to prevent identification.
We regularly review our data holdings and delete or anonymize data that is no longer necessary. If you exercise your right to erasure (see Chapter 9), we will remove your data unless we are legally required or allowed to retain it for a longer period.