Recommendation
Use per-note locks when you want to stay in Apple Notes. Use app locking for device-local access control on supported iPhones. Use a separate secure container when you need a collection designed around one protected vault rather than an organizational Notes folder.
Match the tool to the boundary
Several Notes itemsLock each eligible note and use neutral titles.
Casual device accessLock the Notes app where the current iOS version supports it.
Mixed files and mediaEvaluate a dedicated secure storage app and its backup/export model.
Team collaborationUse access-controlled collaboration—not one shared password.
A separate secure-container option
Folder Lock
Folder Lock offers protected storage workflows on supported platforms. It does not add a password to an Apple Notes folder or change Apple Notes limitations. Consider it only when moving selected content into a separate app fits your backup, export, privacy, and recovery requirements.
Review Folder Lock
