TomTop offers the Konnwei OBD II Bluetooth Car Engine Diagnostic Tool for Android in several colors (Red pictured) for $13.49. Coupon code "AK6202" knocks that to $10.49. With free shipping, that's the lowest price we could find by a buck. This device connects to your Android smartphone via Bluetooth 3.0 to display the real-time operating performance of your car. It measures fuel consumption, turns off the "Check Engine" signal, and downloads data to external media.
Note: This item ships from China and requires two to five weeks for delivery. The countdown timer on the product page does not reflect an actual expiration time and resets daily.
We pay for so many things that we actually can get for free or cheap. Find out how to stop making these dumb purchases.