Is Spir secure?

The help page has been moved here.
This page is not updated, so please refer to the above for the latest information.
Spir uses Google’s high-security standards for its user authentication. Third parties will not be able to access your account information.
Furthermore, information on your Google Calendar or Outlook calendar (titles, dates and times, attendees, locations, memos) is not stored on Spir’s databases. Spir only stores calendar information relevant to schedules created on Spir.