If you use Android OBD Apps and want to save a screenshot simple hold the volume down button and power button down at the same time. It seems to work for nearly all version of Android later than 4 including Kindle Fire OS. You can then send the picture by eMail or other connection. My Kindle Fire will even cast it to the my Fire TV box.
Full details http://www.pcadvisor.co.uk/how-to/google-android/how-take-screenshot-on-android-phones-tablets-summary-windows-ios-android-3623449/
Example this screenshot is the app for my Bluetooth multimeter running on a Kindle Fire
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