Your iPhone encrypts its storage as soon as you set a passcode. That's real protection, and it's on by default for almost everyone. What it doesn't do is give you a second, separate lock for specific files once the phone is unlocked, which is the moment most privacy problems actually happen. Here's what iOS offers for that, and where each option stops.

What's Already On: Data Protection

Every iPhone with a passcode uses Apple's Data Protection to encrypt what's stored on the device, with keys tied to that passcode. A locked or powered-off iPhone is unreadable without it. That's the same default covered in What Happens to Your Data When Your Phone Is Stolen, and it's the reason a stolen, locked iPhone is mostly a hardware loss rather than a data loss.

The gap is everything after unlock. One passcode opens the whole phone. Anyone who has it, or who picks up the phone while it's unlocked, sees your files exactly the way you do. The same blind spot exists on the other platforms too, covered in How to Encrypt a Folder on Mac and How to Encrypt a Folder on Android.

The Built-In Options, One by One

iOS has no single "encrypt this folder" button. Instead it has a few partial tools:

  1. The Files app. No folder passwords and no per-folder encryption. On recent iOS versions you can long-press the Files icon and choose Require Face ID, which gates the whole app behind your device unlock.
  2. The Hidden album in Photos. Locked behind Face ID, Touch ID or your passcode by default on recent iOS versions. It hides photos from the main library, but it isn't a separately encrypted space. Photo Vault vs. Hiding Photos explains why hidden and encrypted aren't the same thing, and our Hidden album comparison goes further.
  3. Locked notes. The Notes app can lock individual notes with your passcode or a separate Notes password, and locked notes are encrypted. It's the closest thing iOS has to a private, separately locked space, but it's built for text, not a library of photos and documents.
  4. Advanced Data Protection. An opt-in iCloud setting that extends end-to-end encryption to more of your iCloud data, including iCloud Drive and Photos. It protects the cloud copy, not a folder on the phone.

All four are free, and turning on the ones that fit you is worth doing regardless of anything else on this page.

Where the Built-In Options Stop

  • One key for everything. The Files app lock, the Hidden album and (by default) locked notes all open with the same passcode or Face ID that unlocks the phone. Someone who has your passcode has all of them.
  • No private place for files. Notes can lock text. Photos can hide pictures. Nothing built in gives you one encrypted, separately locked place for photos, videos and documents together.
  • Apple devices only. None of this follows you to a Windows PC or an Android phone.
  • Nothing for pressure situations. There's no equivalent to a Decoy Vault for a moment when being asked to unlock something is itself the risk.

None of that makes the built-in tools weak. They're good at what they're for: protecting the phone and its iCloud copies. They just don't separate your most private files from the rest of the phone.

When a Dedicated Vault App Is Worth It

A vault app like Vaultine encrypts files on-device with AES-256 and puts them behind their own PIN, separate from your iPhone passcode and Face ID. Photos, videos and documents live in one place, the same vault works on Mac, Android and Windows too, and a Decoy Vault and Duress Vault cover the situations where refusing to unlock isn't really an option. Cloud backup is optional and off by default, so your files stay on your device unless you choose otherwise.

The honest trade-off: if all you need is to keep a few photos out of the main library, the Hidden album is free and already there. If you want a second lock that your phone passcode doesn't open, a dedicated vault fills that gap.

The Short Version

Your iPhone is already encrypted once you set a passcode, and iOS adds a few partial tools on top: Face ID on the Files app, the Hidden album, locked notes, and Advanced Data Protection for iCloud. All of them either share your phone's one unlock or protect the cloud copy rather than the file on the phone. A separate lock for your most private files is what a dedicated vault adds.

Try it free with up to 10 files at vaultine.app.