Sync Between Apple Devices and Continuity Features Are Two Different Things
Synchronisation and Continuity are related, but they serve different purposes within the Apple ecosystem. They should not be confused with each other.
1. Synchronisation between Apple devices
Synchronisation primarily keeps your data updated and consistent across your Apple devices through iCloud. When you enable the relevant iCloud settings, information such as Photos, Contacts, Calendars, Notes, Reminders, Safari bookmarks, and iCloud Drive files can be synchronised across your iPhone, iPad, and Mac.
For example, if you add a contact on your iPhone, it can appear on your iPad and Mac when Contacts synchronisation is enabled for the same Apple Account. Similarly, changes to a note on one device can be reflected on your other devices.
However, synchronisation depends on the particular service, your iCloud settings, available storage, and an internet connection where required. Not every type of data is automatically synchronised.
2. Continuity features
Continuity is a broader collection of Apple features designed to let you work seamlessly across your Apple devices. It is not merely about keeping data synchronised. It enables devices to work together, allowing you to start an activity on one device and continue it on another, or use one device to perform a task involving another.
Examples include:
- Handoff: Start an activity in a supported app on your iPhone and continue it on your Mac or iPad.
- Universal Clipboard: Copy text, an image, or other supported content on one Apple device and paste it on another.
- AirDrop: Transfer files, photos, and other content between nearby Apple devices.
- iPhone Mirroring: View and interact with your iPhone through your Mac, where supported.
- Continuity Camera: Use your iPhone as a camera or microphone for supported Mac features.
- Continuity Markup and Sketch: Use an iPhone or iPad to add sketches, annotations, or signatures to supported documents on your Mac.
- Phone calls and text messages: Make or receive calls and access supported messages on other Apple devices, subject to the relevant settings and requirements.
- Universal Control: Use a single keyboard and mouse or trackpad to control a Mac and a nearby iPad or another supported Mac.
Some Continuity features use Bluetooth, Wi-Fi, peer-to-peer connections, or other technologies. They do not all depend on iCloud synchronisation in the same way.
The key difference
Synchronisation keeps supported data consistent across devices. Continuity enables supported Apple devices to work together and share activities, controls, or capabilities.
For example, synchronising your Photos library makes your photos available across your devices. Using your iPhone as your Mac's camera is a Continuity feature. Both contribute to the seamless Apple ecosystem, but they accomplish different things.
Therefore, having iCloud synchronisation enabled does not automatically mean every Continuity feature will work. Likewise, a Continuity feature can work without requiring you to synchronise the corresponding data through iCloud.
In short, synchronisation is about keeping your data up to date across devices, whereas Continuity is about making your devices work together seamlessly.