What is iCloud Reminders?
You can create and manage to-do items and organise them into lists using Reminders on iCloud.com. You can also share reminder lists with other iCloud users.
Changes you make to reminders and reminder lists on iCloud.com automatically appear on your iPhone, iPad, iPod touch and Mac when those devices have iCloud Reminders turned on. If you are not using upgraded reminders, you can also see your reminders on a Windows computer if Tasks is turned on.
Reminders also appear in Notification Center on your iPhone, iPad, iPod touch and Mac.
If you do not see Reminders on iCloud.com, your account just has access to iCloud web-only features. To gain access to iCloud Reminders and other iCloud features, set up iCloud on your iPhone, iPad, iPod touch or Mac.
If you are using another feature on iCloud.com, you can switch to Reminders by tapping the feature’s name at the top left-hand corner of the iCloud.com window.
Note: If you upgraded your iCloud Reminders account, you can see your reminders on iCloud.com and any device with iOS 13, iPadOS 13, macOS Catalina 10.15, or later.