A 4-digit PIN has only 10,000 combinations. To unlock with one, Bramble would have to keep a key on your device that the PIN opens. Anyone who copied that key could try every PIN in less than a day, and the PIN would then be all that protects your whole vault.
Unlock without typing your password
Each of these skips your master password, and your device or security key guards it:
| Where | Use |
|---|---|
| Phone | Face ID or a fingerprint |
| Desktop app on a Mac | Touch ID |
| Browser extension on a Mac or Windows PC | Touch ID or Windows Hello |
| Browser extension in Chrome, Brave or another Chromium browser | A security key, like a YubiKey |
Windows Hello accepts your Windows Hello PIN. On an iPhone, Allow passcode fallback lets your phone’s passcode unlock your vault too. Your device checks these, not Bramble.
To type your master password less often, set a longer Auto-lock timeout in Settings → General.