Apple and system calendars
Calendars that appear in Apple Calendar can appear in InstaCal through the system calendar store. Grant Calendar access during onboarding, then open Settings → Calendars to show or hide individual calendars.
This route works well for iCloud and any account you already manage in the device’s Internet Accounts settings.
Connect Google or Microsoft directly
Open Settings → Accounts, choose Add Google Account or Add Microsoft Account, and finish the provider’s sign-in page. InstaCal returns to Settings and begins its first sync.
Direct accounts add provider-aware behavior such as incremental sync, richer invitation handling and replies from InstaCal. They can be used alongside Apple-managed calendars.
Read account status
The Accounts page labels each connection as Connected, Syncing, Offline or Sign-in Needed. Offline accounts keep showing their last cached events. Sign-in Needed means the provider rejected or expired the saved authorization; select the account and reconnect it.
Remove an account
Open Settings → Accounts, select the direct account and remove it. InstaCal deletes its saved authorization and local cache for that connection. The original calendar and events remain with Google or Microsoft.
Note: Adding the same provider through Apple Calendar and directly through InstaCal can expose the same event twice. InstaCal de-duplicates matching cross-source events where possible, but using one route per account keeps the setup easiest to understand.
