# CarSweep: Audio EQ tuning — Frequency Response & RTA > iPhone-based acoustic measurement tool for car audio system tuning. (iPhone/iPad app by Jannes Oppermann.) - Source: https://appshunter.io/ios/app/carsweep-audio-eq-tuning/id6799005301 (this page in markdown: same URL + `.md`) - Developer: [Jannes Oppermann](https://appshunter.io/developer/6799005303) - Category: Utilities, Music - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 18.6 · 2 MB - Languages: American English, German (Germany) - Released: 2026-08-16 - Data updated: 2026-09-08 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/carsweep-audio-eq-tuning/id6799005301/reviews.md ## What is CarSweep? Does your car audio system sound muddy, boomy, or dull? CarSweep turns your iPhone into an acoustic measurement tool with the precision of room calibration software no complex setup required. Measure what your stereo actually does, and get the exact numbers to fix it. WHY CARS SOUND DIFFERENT THAN EXPECTED A car cabin is one of the toughest acoustic environments. Leather seats absorb high frequencies, glass reflects mid-range sound, and compact cabin dimensions create uneven bass peaks. Factory equalizers and DSPs can't fix what you can't measure. CarSweep reveals the exact acoustic behavior of your interior so you stop guessing and start tuning. HOW IT WORKS CarSweep plays an acoustic test sweep over Bluetooth, measures the response through your iPhone mic or an external calibrated USB microphone, computes the frequency response using high-precision FFT, and works out the corrections. EZ TUNING: ONE SWEEP, THEN THE NUMBERS No acoustic expertise required. Four steps: 1. Pick your stereo 2. Set the volume with pink noise 3. Run one sweep 4. Read the value for every control your car has YOUR CAR'S OWN EQ A factory system has five or six fixed sliders and a ten-band suggestion is no help when your screen shows something else. CarSweep knows how those controls are built, solves them together, and shows the same row of sliders you see in the car with a number on each. Profiles for Tesla Model 3/Y (standard and premium audio) and VW/Audi with MIB3 infotainment, plus the classic bass/mid/treble set that fits many common stereos. EXPERT MODE: FOR ENTHUSIASTS & AUDIOPHILES Full control for audio engineers, DSP tuners, and enthusiasts: - Detailed frequency response charts and target curves - Key acoustic metrics: delay, signal-to-noise ratio, RMS deviation - Parametric or fixed-band EQ recommendations - Band grids from 6 to 31 bands, or your own, saved by name - Export EQ presets as JSON for DSP loading - External measurement microphones (e.g. miniDSP UMIK-1) with calibration files LIVE RTA (REAL-TIME ANALYZER) Adjust your system while you turn the knob. Pink noise plus a live third-octave spectrum, with fast, slow, or moving-mic averaging to even out the standing waves of any single seat. FEATURES AT A GLANCE • Guided EZ Tuning — one measurement, then the settings for your car • Vehicle EQ for factory systems, drawn like the screen in your car • Expert mode with sweep generation, response curves and EQ suggestions • Real-time analyzer with 1/3-octave spectrum • External USB measurement microphone support (UMIK-1 and others) • Mic calibration file (.txt) import • JSON export for parametric and graphic EQ profiles • Measurement history stored locally on device • 100% private: no tracking, no backend, no accounts, no ads, no telemetry CARSWEEP PREMIUM (ONE-TIME PURCHASE) The free version measures from 250 Hz to 10 kHz, tunes the classic bass/mid/treble controls and covers 6, 7 and 8 band grids. One purchase, no subscription, unlocks: 1. The full range, 20 Hz to 20 kHz — subwoofer, cabin gain and everything that makes a car boom lives below 250 Hz 2. Vehicle EQ profiles for specific factory systems 3. External USB measurement microphones 4. Mic calibration files, and the larger and custom band grids Only the external microphone needs extra hardware. Everything else works with the iPhone you already have. Take control of your car's acoustics. Measure, adjust, and hear what your system can actually do. ## Key features - 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 ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | CarSweep Premium | $3.99 | one-time | ## Frequently asked questions about CarSweep ### 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. ## Version history (last 4 releases) ### 1.5 — 2026-09-05 NEW: Your car's own EQ. Pick your stereo and CarSweep works out the value for every slider it has — shown the way the car shows them. Profiles for Tesla Model 3/Y and VW/Audi MIB3, plus the classic bass/mid/treble set. • EZ Tuning is now four steps and a single sweep instead of six steps and three, and it ends with the numbers for your stereo instead of "turn the bass down a bit". • Band grids: build your own, give it a name, keep several side by side. Presets are copied rather than overwritten, and the editor is a list with proper stepping instead of a text field. • The guided flow now says where to hold the phone — in front of your face, at the height your head normally is. It is the question we get most. • Fixes: the vehicle EQ no longer splits one bass correction across two sliders; equal-height cards on the home screen; the apply button no longer breaks mid-word next to a long grid name. ### 1.4 — 2026-08-31 • NEW: Real-Time Analyzer (RTA) mode with pink noise generation and live 1/3-octave spectrum visualization. • NEW: Customizable EQ parameters in Expert Mode. • Extended iOS support (now compatible back to iOS 18.6). • Audio pipeline improvements: Resolved input routing and audio dropout issues when using Bluetooth. ### 1.3 — 2026-08-23 -CarSweep Premium jetzt verfügbar! ### 1.2 — 2026-08-16 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*