Yes! Echometer is a German software provider and is GDPR-compliant.
Echometer has been designed to ensure data security to the highest standards. All communication and data storage is encrypted accordingly.
Echometer's contract for commissioned data processing and other documents can be viewed here: https://echometerapp.com/de/gdpr-and-security/#dpa
If you have any questions about data protection, please contact support[at]echometer.de.