Karbu is a free app available for Android devices that allows users to find the cheapest gasoline prices in their area. Developed by Romain Guefveneu, this travel and navigation app provides up-to-date fuel data from open sources, including the French government's official website, and OpenStreetMap.

One of the most significant advantages of Karbu is its ease of use. It has a simple and intuitive interface that allows users to locate all the gas stations in their surroundings. Moreover, you can filter and sort the stations by different parameters such as price, distance, and recommendations.

Karbu also offers additional features such as the ability to add favorite stations and check the evolution of fuel prices for each station over the last two months. Additionally, it has a collaborative feature that allows users to report fuel shortages or outdated prices.

Overall, Karbu is an excellent app for drivers who want to save money on gasoline and make informed decisions about where to fill up their tanks.