Its own passcode
Enter a vault’s passcode when MaxVault opens and only that vault appears.
Keep family photos, work documents and anything else apart. Each vault has its own files, folders and passcode, and only the vault whose passcode you enter opens.

Enter a vault’s passcode when MaxVault opens and only that vault appears.
Nothing in one vault shows up in another, so opening one never reveals the rest.
The Vaults screen appears only in your primary vault, so opening any other vault gives no hint that more exist.
Fill a vault with harmless content, and open it, or let Panic Action switch to it, if you are ever pressured to unlock the app.