The Tractor Guide app is a great reference for anyone who is looking to buy a new tractor, planning to host an auction, or for those who research or collect tractors. The app tells the user what year the tractor of interest was produced in based off of inputs such as the make and serial number. It can determine the tractors year for both current models and antiques. It provides information on many different tractor brands, such as Case, Deutz, Ford, John Deere, Massey Ferguson, and much more. This is a paid app and is available to IOS operating systems.