Privacy Policy
Last updated: June 1, 2026
Gyst (“Gyst,” “we,” “us”) is a scheduling assistant that works on top of Google Calendar through a Chrome extension, an iOS app, and this website. This policy explains what we collect, why, and the choices you have.
Limited Use disclosure
Gyst’s use and transfer of information received from Google APIs adheres to the Chrome Web Store User Data Policy, including the Limited Use requirements. We also comply with the Google API Services User Data Policy. We do not use Google user data for advertising, and we do not sell it.
Information we collect
- Account identity. When you sign in with Google we receive your name, email address, and profile image to create and identify your account.
- Google Calendar data. With your permission we read your calendar events and create or update events you approve, so Gyst can suggest and place scheduling proposals.
- Scheduling preferences. Work hours, timezone, and any preferences you provide, used to tailor suggestions.
- Your AI provider key. If you supply your own model API key, we store it encrypted at rest and use it only to generate your scheduling proposals.
How we use information
We use your data solely to operate Gyst: syncing your calendar, generating and placing scheduling proposals you can approve, and remembering your preferences across the extension, iOS app, and web. We do not use it for advertising or profiling, and we do not share it with third parties except the infrastructure providers below that process it on our behalf.
Service providers
We rely on a small set of processors to run the service: Google (calendar and sign-in), our hosting and database providers, and background-job infrastructure. Each processes data only to provide their part of the service. If you bring your own AI model key, requests are made to that provider under their terms.
Data retention & deletion
We keep your data while your account is active. You can request access to, or deletion of, your account and associated data at any time by emailing support@gyst.app. You can also revoke Gyst’s access to your Google account at any time from your Google Account permissions.
Security
Data is transmitted over HTTPS and stored with access controls. Sensitive credentials, such as your AI provider key, are encrypted at rest. No method of transmission or storage is perfectly secure, but we take reasonable measures to protect your information.
Contact
Questions about this policy? Email support@gyst.app.