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Todoist Login Screen Is Blank in BusyCal iOS

BusyCal for iOS connects to Todoist using a web sign-in flow. If you tap Connect and the Todoist login step shows a blank screen, the issue is usually related to your device’s browser settings.

Fix: Set Safari as Default, Then Retry​

  1. Make sure Safari is set as your default browser on your iPhone/iPad. (Apple’s steps are here: https://support.apple.com/en-us/104975)
  2. Open Safari, sign in to your Todoist account at https://todoist.com to confirm it loads normally, then sign out.
  3. Go back to BusyCal and try again: BusyCal > Settings > Accounts > Add Account > Connect (next to Todoist).
  4. If it still shows a blank screen, temporarily disable common web traffic filters and try again:
    • VPN apps
    • DNS / web filters (for example: NextDNS-style profiles)
    • Ad blockers / content blockers (Safari extensions)
    • iCloud Private Relay (if enabled)
  5. Try on a different network (switch Wi‑Fi networks, or try cellular data).
  6. Force-quit BusyCal, reopen it, and try again. If needed, restart the iPhone/iPad and retry.
  7. Check iOS restrictions and Safari settings that can break web sign-in:
    • Screen Time / Content & Privacy Restrictions (or a work/school MDM profile)
    • Settings app > Safari: JavaScript enabled, and not blocking all cookies
  8. As a last resort, clear Safari website data and retry (this will sign you out of websites): Settings app > Safari > Clear History and Website Data.

If you’d like more background on how BusyCal syncs Todoist projects and tasks, see: Using BusyCal iOS with Todoist.

If It’s Still Blank​

Please contact BusyMac support and include the following details so we can help quickly:

  • Your iOS/iPadOS version and BusyCal version (BusyCal > Settings > About)
  • Whether Todoist login works normally in Safari on the same device
  • Whether you were using a VPN / Private Relay / content blocker when the issue occurred
  • Whether Screen Time / MDM restrictions are enabled on the device
  • A screenshot of the blank screen
  • BusyCal logs (go to BusyCal > Settings > Help > Email Support and include logs)
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