Our applications use Apple's iCloud service to synchronize your data across all your devices. When you make changes on one device, those changes are automatically uploaded to iCloud and then downloaded to your other devices that are signed in with the same Apple ID.

The synchronization happens automatically in the background whenever your device has an internet connection. There's no need to manually sync or transfer data between devices.

In most cases, iCloud sync is enabled by default when you first install the application. However, you can verify and manage sync settings:

1. On iOS: Go to Settings > [Your Name] > iCloud, and make sure our app is toggled on
2. On macOS: Go to System Preferences > Apple ID > iCloud, and check that our app is selected
3. Within the app: Go to Settings/Preferences > Sync and ensure iCloud sync is enabled

If sync is disabled, simply toggle it on to start synchronizing your data.

Synchronization speed depends on several factors:

• Internet connection speed and stability
• The amount of data being synchronized
• Current iCloud server load
• Battery status (sync may be paused in low power mode)

Under typical conditions with a good internet connection, small changes should sync within seconds or minutes. Larger data transfers (like importing many files) may take longer.

If your data isn't syncing, try manually refreshing by pulling down on the screen, closing and reopening the app, or checking our troubleshooting guide.

Our applications handle offline changes using conflict resolution:

1. All changes made while offline are stored locally on each device
2. When the devices reconnect to the internet, they upload their changes to iCloud
3. If there are conflicting changes to the same data, our app will generally keep the most recent version
4. For critical data, some of our apps will create conflict versions and let you choose which to keep

To minimize conflicts, we recommend avoiding major edits to the same data on multiple devices while offline.

The sync capacity is determined by your available iCloud storage:

• Apple provides 5GB of free iCloud storage per Apple ID
• Additional storage can be purchased from Apple (50GB, 200GB, or 2TB)
• Our app's data counts against this storage quota

If you're running low on iCloud storage, you'll receive warnings from iOS/macOS. You can check your current usage in Settings > [Your Name] > iCloud > Manage Storage.

We take data security seriously:

• All data is encrypted during transfer using TLS (Transport Layer Security)
• Data stored in iCloud is encrypted at rest
• Apple's end-to-end encryption protects sensitive information
• Our applications never store your Apple ID credentials

For additional security, some of our applications offer optional local encryption with a password that's never stored in the cloud.

Yes, many of our applications offer selective sync options:

1. Go to the app's Settings or Preferences menu
2. Look for Sync settings or iCloud options
3. You'll find toggles for different data categories
4. Turn off sync for any categories you want to keep local only

Keep in mind that local-only data won't be backed up to iCloud and won't be available on your other devices.

If you're experiencing sync issues, try these troubleshooting steps:

1. Check your internet connection
2. Verify that you're signed in with the same Apple ID on all devices
3. Ensure iCloud sync is enabled for the app in iOS/macOS settings
4. Restart the application
5. Restart your device
6. Check your iCloud storage (Settings > [Your Name] > iCloud)
7. Force a sync by making a small change to your data

If problems persist, check our Data Sync Issues troubleshooting guide or contact our support team.