We already know the Moto X (and Droid Ultra, MAXX and Mini) camera app will feature a minimalistic, gesture-based UI, but the clever souls over at Android Police went one step further and recently leaked an APK of the app. The file (later pulled and cached here) installs just fine on many devices but lacks some functionality. We tested it on a Nexus 4 running Android 4.2.2 (Jelly Bean) and it worked okay, mostly. HDR and slow-motion video recording are disabled, panorama mode crashes and Quick Capture (double-twist your wrist to launch the camera) is not operational.
Still, the camera UI is ultra simple -- swipe right for the settings, left for the gallery, up /down for zoom; tap to capture, and hold to take multiple shots. The resulting pictures (16:9 aspect ratio) look pretty much like those snapped with the stock Android camera, and suffer from the same composition issues since the viewfinder crops the right edge of every image. It'll be interesting to see if any of this changes when we finally get our hands on the Moto X next week. Until then, check out the gallery of screenshots below and sound off about the APK in the comments.
Gallery: Moto X camera app