I built a mobile REW-light application to make measuring quicker and easier.

The app is called [**CarSweep**](https://apps.apple.com/us/app/carsweep/id6799005301). I originally built it to tune the DSP in my car (because convertibles are absolute acoustic nightmares), but the math is the same, and it can be used in a AV-System just as good.

Here is what it does:  
**Log Sweeps & FFT:** Plays a sweep over Bluetooth, records it, and calculates the actual frequency response at your listening position.

**UMIK-1 Support:** The built-in iPhone mic is fine for a quick check, but if you own a miniDSP UMIK-1 (or similar USB mic), you can plug it into your iPhone and import your specific .txt mic calibration file for accurate measurements. (Experimental)

**Real-Time Analyzer (RTA):** Streams continuous pink noise with a live 1/3-octave spectrum (Fast, Slow, and Moving-Mic averaging) so you can adjust your hardware EQ/DSP in real time.

**Parametric EQ Generation:** Calculates concrete parametric EQ values based on your target curve, which you can export as a JSON preset or manually dial into your DSP.

It’s a hobby project, so there is no subscription. The base app is free, completely offline, and has no ads or trackers. There is a single one-time purchase to unlock the Expert features (UMIK-1 support, custom curves, expanded 20Hz-20kHz range) just to help cover my costs.

If you are a regular REW user, I’d love for you to measure your listening room with both and tell me how my curves compare to your laptop setup. Feedback is hugely appreciated!

I built a „REW-light“ app for IOS to make measuring quicker and easier.