Mini 4WD Companion

Measure RPM, compare motors, calculate speed, and look up Mini 4WD parts from one tuning toolkit.

Mini 4WD Companion is an unofficial utility app for Mini 4WD hobbyists.

It provides practical tools to help racers and builders measure, compare, and tune their setups from one place.

Features include:

Digital RPM Meter Measure motor RPM using your phone's microphone.

• Real-time RPM readings
• Live frequency analysis
• Noise calibration for improved accuracy
• Saved readings for progress tracking

Parts Lookup Search parts by item number, name, chassis, or description.

• Filter by category and chassis
• Quick lookup while building or tuning
• Opens manufacturer product pages externally for official details

Motor Guide Review motor characteristics and tuning references.

• Compare motor types
• Check break-in notes
• Use reference information while testing setups

Speed Calculator, Gear ratio Estimate theoretical setup speed based on RPM, gear ratio, and tire size.

• Compare gear options
• Test setup changes quickly
• Use as a planning tool before race day

and more tools

This app is an independent project for hobby use and is not affiliated with or endorsed by any manufacturer.