Ratio Calc is a lifestyle app designed specifically for radio control car racers. This quick and easy tool allows racers to calculate their final drive ratio (FDR) trackside, providing valuable information for gear comparison and ensuring optimal performance.

With Ratio Calc, users can effortlessly select their car by filtering through a vast database of over 1600 cars and variants. The app also allows users to save their favorite cars for quick access and even add notes and track names for better organization.

One of the standout features of Ratio Calc is its ability to generate ratio and rollout charts. These charts plot pinion and spur gear combinations, creating handy reference tables that help racers make informed gear choices.

Moreover, Ratio Calc offers the convenience of sharing ratio/rollout charts with fellow racers, fostering a collaborative environment. Additionally, users can download new cars directly within the app, ensuring that the database stays up-to-date with the latest models.

To cater to individual preferences, Ratio Calc allows users to select their preferred measurement units (imperial/metric) and gear pitch. Furthermore, the app provides alternative ratios in other pitches, offering flexibility to racers with different gear setups.

With its intuitive interface and comprehensive features, Ratio Calc is the go-to tool for radio control car racers looking to fine-tune their gear ratios and optimize their performance on the track.