The manyattempts at weaving biometric identification into mobile devices have usually focused on only one aspect at a time, whether it's fingerprints or voices, and often for access to just the device itself. AOptix isn't quite so narrowly focused. Its new Stratus system combines an app with a custom iPhone 4 / 4S case (the Stratus MX) to verify faces, irises, fingerprints and voices for grander purposes, whether it's office workers checking in or entire national ID programs. The bundle should be more portable than most such alternatives, as well as more intuitive through its familiar interface. Odds are that you won't be buying a Stratus kit to scan friends and family at home, though. Apart from the bundle's lack of support for the iPhone 5 or any non-iOS platform, the Stratus software in the App Store isn't an impulse purchase at $199 -- and an emphasis on quotation-based case sales likely means you'll be the scanner's target, not its owner.