Q: "Recently, I've been unable to get notes to sync across any of my devices, including between iPhone and iPad after updating to iOS 11. I have enabled notes in the iCloud settings screen on all devices, but the contents of Notes aren't up to date. I can't find any way to fix or troubleshoot this. I have important notes on all my devices, so I need to merge all of them, rather than pick one to sync across the rest."
Notes not syncing between iPhone and iPad or notes not syncing between iPhone and Mac happens from time to time after updating to new iOS 11/11.2/11.2. The issue is most likely caused by software-related problems, and you can try to fix it by yourself using following possible solutions.
1. Make sure you have signed in the same iCloud account on iPhone and iPad.
2. Check whether you have enabled iCloud service for Notes on iPhone and iPad or not.
3. Turn off iCloud for Notes and turn it on again after a while.
4. Makes sure you have disabled "On My iPhone" for Notes on your iPhone.
5. Sign out iCloud and restart your iPhone & iPad. Then, sign in your iCloud account
6. Check if you have any mail account that also sync notes, like Gmail, Outlook or Exchange, which can also cause confusion with iCloud and syncing notes.
7. Update to the latest iOS 11 version. iOS 11.2.5 has been released just now, which includes bug fixes and improvements. You can try to fix notes not syncing between iPhone and iPad.
If none of the small tricks above can solve the notes not syncing problem, here is a better way to sync notes between iPhone and iPad by using Qiling MobiMover Free. Compatible with Windows 7/8/8.1/10 and iOS 11.2/11.1/10.3/10.2/10.1/10, Qiling MobiMover Free allows you to transfer the whole notes from iPhone to iPad in one-click. What's more, if you need back up your iPhone data to the computer for data security or transfer files from PC to iPhone to add ringtones to iPhone/iPad, download MP3/MP4 to iOS device or save eBooks on iPhone/iPad, MobiMover Free will meet your demands with easy-to-get methods. (Devices running iOS 11 or later are not supported to transfer notes due to the limits of iPhone operating system.)
Now, click the button to download and install Qiling MobiMover Free on your computer, then follow the steps to copy notes from one iOS device to another.
Step 1. Connect your iOS devices to your computer (Mac or PC) with two USB cables and launch Qiling MobiMover. Unlock your devices and click "Trust" to trust your computer. To transfer notes between your iOS devices, click "Phone to Phone" and specify the transfer direction. Then click "Next" to continue.
Step 2. You will see the list of the categories you can transfer from your iPhone to your iPad. Check "Notes" and click "Transfer".
Step 3. Wait for the transfer process to finish. When it has completed, go to the "Notes" app on your target device and check the transferred items.