There is really no way to open Locked Notes on iPhone or iPad if you have Forgotten Notes App Password. The only way out in this case is to Reset Notes App Password on iPhone.
Reset Notes App Password On iPhone
The Notes App on iPhone allows you to Lock Notes with Password, providing a second layer of security for your personal data.
However, the Password for Notes App is not the same as your Lock screen password, which increases the chances of forgetting Notes Password, especially if you are not using Notes on a regular basis.
As mentioned above, there is really no way to open a Locked Note on iPhone, without entering the Password that was used to Lock the Note.
The only option in case you Forgot Password For Notes is to Reset Notes Password. Unfortunately, this does not unlock any of the previously Protected Notes on your iPhone.
To make this clear, all the Notes that you had previously protected using forgotten Notes Password will continue to retain the same old Password and you won’t be able to access them.
Steps to Reset Notes App Password On iPhone
Follow the steps below to Reset Notes App Password on iPhone or iPad.
1. Open Settings on your iPhone or iPad.
2. On the Settings screen, scroll down and tap on Notes.
3. On the Notes screen, tap on Password.
4. On the Next screen, scroll down and tap on Reset Password option.
5. On the pop-up, enter your Apple ID Password and tap on OK.
6. On the next screen, type the New Password for Notes App, verify the Password, type a Password Hint and tap on Done.
This will Reset the Notes App Password on iPhone and all the New Notes that you create from now onwards will be protected with the New Password.
As mentioned above, previously created Notes will continue to retain the old Password and you won’t be able to access them using the New Notes Password.
Note: The Notes App Password Reset will be reflected across all your Apple Devices, in case you are using iCloud Notes or iCloud Keychain.