An ordinary lock screen may guard one visible library. NullVault uses a pattern to address a particular vault. Lock the app and draw another established pattern to open another private space. Opening one does not reveal a switcher listing the others.

This does not make the app installation or all device activity invisible. It limits what the ordinary product interface reveals after one vault is opened.

Does NullVault encrypt the actual files?

NullVault encrypts file contents, filenames, metadata, and app-managed previews before storing them in private app storage. It uses AES-256-GCM authenticated encryption and Argon2id key derivation, with platform-protected key material participating in local access.

Read how encrypted photo vaults work and the security architecture rather than judging the product only by algorithm names.

Can it work without an account?

Yes. Local Android vaults can be created and used without a NullVault account. Content remains in private app storage unless you explicitly export it or create an encrypted backup. Account-free is not backup-free: you still need a resilience plan for loss or reset.

What can it protect besides photos?

Photos, images, videos, documents, other files, and private text notes can live together. Direct photo and video capture can place new content into the active vault without intentionally saving it to the public gallery.

What if I forget a pattern or lose the phone?

Those are different failures. A device-recovery phrase can replace a forgotten pattern while the vault remains on the same device. A portable encrypted backup plus its separate backup phrase addresses device loss, reset, or migration. Neither credential substitutes for the other.

Example: Jamie forgets a vault pattern but still has the phone; device recovery can replace it. Months later the phone is destroyed; the device phrase alone cannot recreate the data, but the portable encrypted backup and backup phrase can.

Is NullVault best for high-risk situations?

It offers optional destructive duress and panic protections on Android. These features can permanently invalidate local access and do not erase exported backups, system snapshots, recipient copies, or physical storage cells. They are advanced tools, not universal safety guarantees.

Where NullVault is not the best fit

  • You want a familiar cloud photo library on every browser and device.
  • You prioritize shared albums, automatic editing, or family collaboration.
  • You want an entire cloned-app environment on a compatible Samsung phone.
  • You do not want to manage recovery phrases or encrypted backups.
  • You require identical backup, sharing, screen-capture, or emergency controls on iOS and Android; NullVault keeps these platform differences explicit.

Bottom line

NullVault is best for people who value separate private spaces, explicit local encryption, controlled exports, and independent recovery planning more than seamless cloud convenience. It is available on iPhone and Android.

Comparison reviewed: 28 August 2026.