Installs directly — it isn't on the Play Store. iPhone isn't available yet.
Installing it on Android
Tap the download button above. Chrome will warn that this kind of
file can harm your device. It says that about every app that
doesn't come from the Play Store. Tap Download anyway.
Open the file when it finishes. Android will say Chrome isn't
allowed to install unknown apps. Tap Settings, switch on
Allow from this source, then press back.
Tap Install. If Play Protect offers to scan it first, let it,
then choose Install anyway.
Small improvements arrive on their own the next time you open the app.
Bigger changes mean downloading it again from this page.
How it works
Photograph the VIN. It reads the 17 characters and looks the vehicle up, so it knows the engine and drivetrain it's listening to.
Record the noise while driving. The phone captures the sound and, at the same time, what the car is doing — speeding up, braking, cornering.
Get a diagnosis. Ranked likely causes with reasoning, an urgency level, and follow-up questions you can answer to narrow it down.
Why the driving data matters
Most apps hear a bare clip. This one records the phone's motion sensors on
the same clock as the audio, so it can tell that a squeal happened
only while braking — which is what separates a brake problem from a
wheel bearing. That was the whole idea behind building it.
What happens to your recording
Audio is turned into a picture of its frequencies and then deleted.
Voices are stripped out before even that. Nothing you say in the car is
kept, and no recording is ever stored.
Honestly, what it is
A second opinion, not an inspection
This is a helpful first guess from a recording. It cannot see, touch, or
test anything, and it does not replace a mechanic looking at your car.
Anything to do with brakes, steering or overheating is flagged as
"see a mechanic before driving" — and that's meant literally.