Use calculations safely and legally.

Purpose

The app is designed for offline calculations involving gear ratios, vehicle speed, RPM, tire changes, sprocket values, RC drivetrain values and project setup comparisons. Results are for reference, planning and record keeping, and are not modification advice, repair advice or a safety guarantee.

Purchase and Features

The app is a direct purchase product with no ads, subscriptions or accounts. Available features are determined by the installed version.

User Responsibility

Users are responsible for accurate input values, including tire size, final drive, gear ratios, RPM range and related drivetrain parameters. Incorrect input produces incorrect results.

Users must comply with local laws and must not use the app for illegal speeding, unsafe testing or other unsafe behavior.

Data and Backup

Projects, setups and records are stored locally by default. Users decide whether to export or back up data and are responsible for managing exported files.

Limitation of Liability

To the extent permitted by law, the developer is not liable for losses caused by use or inability to use the app, actions based on calculation results, data loss, device issues or third-party file handling.