You can subscribe to your activities using a personal iCalendar (ICS) feed and display them in your preferred calendar application such as Google Calendar, Apple Calendar, Outlook, or similar services.
You can find this option and the corresponding url at: https://runalyze.com/settings/share
Please note:
Please let us know if you have wishes or have encountered bugs. We give our best to make Runalyze as good as possible for you. - Therefore we would be interested in your suggestions for improvement. In general most questions, problems and ideas are more appropriate to ask in the forum.