Hidden album vs photo vault: what is the real difference?

The iPhone Hidden album and a photo vault app solve different problems. A plain comparison of what each protects and what it does not.

Hidden albumEncrypted vault
Hidden from the main libraryYesYes
Locked behind Face IDYes (iOS 16+)Pattern, optional Face ID
Encrypted with a key only you holdNoYes
Readable by someone with your passcodeYesNo
In iCloud Photos as normal photosYesNo, encrypted backup only
Survives losing the phoneVia iCloud PhotosVia encrypted backup plus recovery phrase
CostFreeFree tier, paid for unlimited

The Hidden album is a curtain. A vault is a safe. If what you need is to keep a few photos out of the grid when you hand someone your phone, the curtain is enough. If the photos must stay unreadable even to someone who knows your passcode, or if they must survive a lost phone without sitting in iCloud Photos, you need the safe.

One thing a vault adds that is easy to miss: deniability. In Vaultpod every pattern opens its own vault and there is no list, so nobody can tell how many vaults exist, or whether any does.