RevCheck: paste two used-car listings, get a second opinion before you drive across town
This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle What I Built Buying a used car in Bulgaria goes like this. You have twelve tabs open on mobile.bg and cars.bg. Half of them say "нов внос" (fresh import), "реални километри" (real mileage) and "без забележки" (nothing to fix). The same car shows up on both sites. Then you lose a Saturday driving to Plovdiv for…
This submission is for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle What I Built. It's a tool called RevCheck which helps you buy a used car with confidence in Bulgaria. The process is complicated as you have to search multiple websites and deal with inconsistencies. RevCheck simplifies this by allowing you to compare two used car listings side by side.
To use RevCheck, you paste the URLs of two car listings from either mobile.bg or cars.bg. The tool then analyzes the listings using open-weight AI models like Gemma 4 vision and DeepSeek V4 Pro. It checks every photo for color, dents, scratches, and equipment, and flags any discrepancies between the photos and the seller's description. It also provides a fair price range for the car based on similar listings found on both sites.
RevCheck gives you a verdict on which car is the better buy, what to check during the viewing, and what to ask the seller before you make the purchase. It's designed to tell you which of the two listings is worth visiting and what to look out for. The tool is available in both English and Bulgarian. This tool could be useful for anyone planning to buy a used car, as it saves time and helps make informed decisions before visiting the car. The project was built for the DEV Hacktoberfest Open-Source AI Challenge, Week 2: Side Hustle.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
