PhaseChecker 4+

Align your speakers

Rick Peacock

Designed for iPad

    • 1.0 • 2 Ratings
    • $0.99



New for iOS17

The PhaseCheck app will run a test signal through your sound system to ensure your speakers are in-phase and wired with the correct polarity. It can be run either manually or automatically. 

Manual mode allows you to run the test signal and flip the phase so you can listen yourself to ensure your sound system is setup correctly. 

Automatic mode will run a series of test signals through your sound system and use the microphone on the device to analyse the results.

New in version 2.0 is a waveform view mode for advanced use. It allows you to play an asymmetrical waveform (ramp waveform), record the sound from each speaker close up and capture the waveforms to then compare them.

Phase is a difficult concept so full help is available in the app to ensure you get the best results.

You should check the phase of your sound system whenever the wiring has been changed to ensure everything is the correct polarity.

When a sound systems speakers are out of phase the sound quality is affected massively. Bass is reduced significantly and stereo imaging gives the illusion of the sounds pulling outside of the room.

To run the check connect your iOS device to your sound system so it can play audio. If possible place the iOS device evenly between the speakers. Phase cancellation will not occur close to the speakers so ensure the device is not too close. Ensure the volume is at a comfortable listening level and if possible ensure there is no background noise to interfere with the scan.

What’s New

Version 2.1

- Improvements for working with bluetooth audio
- Improvements for iOS17

Ratings and Reviews

1.0 out of 5
2 Ratings

2 Ratings

FryDay444 ,


It just plays tones through your phone speakers. 100% useless. What a waste of money.

Seanm57 ,

Doesn't output audio through Bluetooth

Wish the description had said this. Would have saved me a buck. Plays tones out through phone speakers. That doesnt do any good.

Zach-Daniels ,

Does not work with newer cars.

My car is usb or bluetooth only and this app will not work. Car needs an aux jack. And a phone with headphone 3.5mm output

App Privacy

The developer, Rick Peacock, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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