Reminder and notes are built-in features in iOS system, which used to help us remember important things. It helps us to deal with numerous activities and keep your every day orderly. In case you lost our data of calendars or reminders, your well-ordered life will be disrupted. Therefore, restore the reminders and notes are very necessary.
The first way, recover from backup
After you found the notes and reminders get lost, you should try to restore from the backups first.
On your iPhone, go to Settings> Mail, Contacts, Calendars, and then choose the account which your iPhone has synced with.
Switch on the button of notes and Reminder apps on your chosen account.
Then back to the Notes and Reminder apps to check if the disappear data have restored.
The second way, recover with an iPhone data recovery software
If you cannot recover your data from backups, you should try the data recovery software.
Install and run H Data iPhone data recovery software on your computer
Run iTunes app and log in with your Apple ID, then connect your iPhone with computer. The iTunes will sync with your iPhone automatically if you have ever authorized your iPhone on this computer.
Run H Data iPhone recovery software, you will see the latest iTunes backups on the interface.
Select the version you need to scan. You can figure by the time and date and the serial numbers.
Wait for the scanning process ends. After that you can see all the recovered contents on your iPhone, including the contents that you have deleted. All the deleted data are shown in red.
Choose Notes or Reminders on the left side. All your reminders and Notes then display on the right side. The notes in red are what you have deleted. At the bottom, there are two choices for you: select all, or hide existed to show all the not existed records.
Check what you need to recover, and then click the export button to recover them.
At the same time, this recovery program supports recovery directly from your iPhone. You just need to connect your iPhone with the recovery program, then scan and recover your iPhone. Apart from the notes ans reminders, you can also recover your contacts, messages,photos and other data with the iPhone data recovery software.