Allow apps to use your reminder information
Some apps and websites can use your reminder information to provide you with services and features. For example, an app might use your reminder information to help you set up a reminder. See Control access to your reminders.
To authorize an app or a website to use information from your reminders, click OK in the dialog. If you don’t want to authorize the use of your reminder information, click Don’t Allow.
If you allow third-party apps or websites to use your reminder information, any information they collect is governed by their terms and privacy policies. It’s recommended that you learn about the privacy practices of those parties.
You can review and change your privacy settings using the Privacy pane of Security & Privacy preferences.
Choose Apple menu > System Preferences, click Security & Privacy, then click Privacy.