Feature Request: Unlock 1Password for iOS using a custom PIN and not the device passcode

Is it on the roadmap to give us the option to select our own 4-6 digit passcode [pin] instead of using the same passcode that unlocks the iPhone? This seems like a security risk because if someone is able to observe us unlock our phone they potentially have access to our whole lives. I prefer the 1Password7 option where we could define the PIN instead of being relegated to the device pin.