Amazon's Kindle Fire does not natively support the Google Play store (formerly Android Market). In order to install Mobicip on Kindle Fire, you will need to sideload it. It can be accomplished in 3 steps.
Tap the Settings icon at the top right of the screen. Select More > Device. Find and set Allow installation of applications from unknown sources to ON.
Open the browser and visit this URL (http://bit.ly/fire-672). This will download the apk file into your downloads folder. Touch the top left of your screen to access the downloaded file.
NOTE: Apparently, there is a problem with Step 2 on the Kindle Fire HD and a couple of our users identified a solution (Thank you Bob and Daphne.) Download a free file explorer app like ES File Explorer from the Amazon App Store, open it and browse to your Downloads folder, and install the apk as described in Step 3.
Touch the Mobicip APK file and install it. If successful, you should see the Mobicip icon on your Apps screen.
Follow the steps in this tutorial to continue with your setup.