Lemon Detector This handy application will instruct you on what to look for when buying a used car. Follow the 10 steps and answer the questions in each step. The vehicle in question will be rated out of a possible 100 ... Cost: $9 Buy full version       Trial version       Publisher: Palmtree.ca Software     Descriptions Lemon Detector: This handy application will instruct you on what to look for when buying a used car. Follow the 10 steps and answer the questions in each step. The vehicle in question will be rated out of a possible 100 points. Compare the automatically calculated total with the guide and "Detect the Lemons" . It will also allow you to store vehicle data in tabular form and compare with other vehicles you are looking at. Very easy to use even if you don't have much mechanical knowledge!