CarSweep: Car Audio & Room EQ

CarSweep: Car Audio & Room EQ

Stereo & speaker calibration

10 ratings
3 reviews
Free
In-App Purchases

Details

Released
August 16, 2026
Updated
October 20, 2026

Features

CarSweep: Car Audio & Room EQ screenshot #1 for iPhone
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CarSweep: Car Audio & Room EQ screenshot #10 for iPhone
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About

Transform your iPhone into a precise acoustic measurement tool for your car's audio system. Analyze frequency response, identify sound issues, and receive exact tuning numbers to optimize your car stereo's performance without complex setup.

✓Guided EZ Tuning for quick setup
✓Vehicle-specific EQ for factory systems
✓Expert mode with advanced metrics
✓Real-time spectrum analyzer (RTA)
✓External microphone support
✓JSON export for EQ presets
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What's New in CarSweep

2.2

October 20, 2026

Read your measurement down to the decibel, and get help right where you need it. • Touch and hold the frequency response to read exact values: frequency, your level, the target and how far off you are. • Built-in guides: tap the question mark in Expert mode and in the EQ Designer for a step-by-step guide with screenshots. • Music plays fine but CarSweep stays silent? Some head units only play sound from apps that report "playing". Turn on Settings → Playback → Report playback to the stereo. • More reliable measurement microphones: a connected UMIK-1 can be picked before the first measurement, and CarSweep warns you before the iPhone mic records instead. • Fixed a crash that could occur when starting a measurement, especially on iOS 27. Room (beta): • Bass and treble settings for your amplifier are now worked out from both speakers playing together, the way you actually listen. • Room modes are named more reliably, and CarSweep tells you when your left and right speakers differ a lot in the treble.

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Subscriptions & In-App Purchases

$3.99

CarSweep Premium

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User reviews

CarPlay

Does not play over wireless car play. Also tried wired connection with no avail

Response from developer

Thanks for the feedback. CarPlay limits how apps can route audio during a measurement, so the sweep can't run reliably through it. The workaround: 1. connect your phone to the car via Bluetooth audio for the measurement only. 2. Set the EQ values the app gives you in your car's own audio settings, and they'll carry over when you switch back to CarPlay. Sorry for the trouble, and feel free to reach out if it still doesn't work over Bluetooth.

Simple and powerful- awesome tool!

Helped me dial in the best EQ for my add-on sub to really sound great with my factory speakers

Exactly what I wanted

I’ve been waiting for an easy to use app that I can use with my Dayton calibration mic, and this works perfectly.

FAQ

What is CarSweep?

CarSweep is a utility app that uses your iPhone's microphone to measure and analyze your car's audio system's frequency response. It provides specific tuning recommendations to improve sound quality.

How does CarSweep work?

The app plays a test sweep through your car's stereo, measures the acoustic response with your iPhone's mic or an external mic, and then computes the frequency response to suggest EQ adjustments.

Is CarSweep free to use?

CarSweep offers a free version that measures from 250 Hz to 10 kHz and tunes basic EQ controls. A one-time purchase unlocks the full frequency range and advanced features.

Does CarSweep have ads?

No, CarSweep is 100% private and does not contain any advertisements, tracking, or telemetry.

What devices does CarSweep support?

CarSweep is currently supported on iPhone devices.

Can I use an external microphone with CarSweep?

Yes, CarSweep supports external USB measurement microphones like the miniDSP UMIK-1 and allows you to import calibration files for greater accuracy.

What is the age rating for CarSweep?

CarSweep has an age rating of 4+, making it suitable for a wide range of users.

How often is CarSweep updated?

The latest version of CarSweep is 1.5, and it was last updated on September 5, 2026, indicating regular maintenance and improvements.