RevScan - Shazam for car noises, AI diagnosis in 15 seconds

RevScan listens to your car and tells you what's wrong. Hold your phone near the noise, record for a few seconds, and get a specific AI diagnosis, what the issue likely is, how serious it is, estimated repair cost, and what to tell your mechanic. Built real FFT audio analysis that extracts dominant frequency, rhythm patterns, and RPM equivalents before sending to AI.