The Focal case connects to your iPhone via Bluetooth LE and requires you to use Incipio's free inCamera app. Once downloaded, installed, and opened, the app triggers the phone to connect to the case. Press the power button on top and you're done.
The app is pretty basic, though you can pick different flash modes (auto, on, off, and always on); shutter settings (single, burst, and 3- and 10-second timers); turning on a rule-of-thirds grid and/or a level; and switching between photo and video capture. Also, once the case is connected, the power button turns into a programmable function button for quick access to flash, shutter, viewfinder, or camera mode options.
You can also set the case to stay connected to your iPhone for 10 minutes, 30 minutes, or one hour.
Once you've got the shot you want, you can open it up and edit it using the inCamera app's included editor powered by Aviary.
The Focal case doesn't have the shooting modes that the Snappgrip has, a built-in tripod mount, or a set of lenses to attach, but it is more compact, connects faster, and doesn't require charging: it's powered by a replaceable coin-type battery that's good for up to 300 hours of use.
The black version can be found for around $50 (£50), though other colors are closer to the $70 MSRP. So, yeah, it's not cheap, but for those nonstop iPhone shutterbugs out there, the Incipio Focal Camera Case could be priceless for taking better pictures.