Looking for the best listening experience for your iTunes Library? Look no further than LouderLogic – the Advanced Audio Player.

LouderLogic features include:

- Professional audio enhancement with patented ALX technology
- 4-band parametric EQ with Spectrum Animation
- Dynamic interactive Play Queues
- Crossfading

LouderLogic brings the fullness you crave out of every song, using patented Audio Level eXtension (ALX) technology by McDSP. LouderLogic minimizes volume fluctuations between songs while maximizing all the musical details the artist intended you to enjoy. Simply put, you’ll get more from your music!

With the McDSP 4-band parametric equalizer, you get the highest quality interactive EQ for your iOS device, along with the ability to customize and tweak to your heart's content. Easily drag the curves to control boost and cut, and use two fingers to adjust the Q (bandwidth).  Spectrum Animation shows you what your music 'looks like' so you can EQ like a pro.

Play Queues let you modify what's coming up next at any time, without interrupting your current track.

Adjust the crossfade time between songs from 1 to 30 seconds.

“If you don’t have LouderLogic I don’t know why you’re even listening to music.” – Chaka Blackmon, Producer/Songwriter for Christina Aguilera, CeCe Winans, MTV and Disney.

“LouderLogic is perhaps the most impressive audio enhancement app I have used.” – Kit Eaton, New York Times.

Please note that while LouderLogic does play back DRM protected music, it cannot apply ALX enhancement to DRM protected audio. ALX enhancements cannot be applied to music that is still "in the cloud" in iTunes Match, but can be applied once downloaded to your device.

Requires iOS 8.0+

What’s New

Version 2.2.2

This app has been updated by Apple to use the latest Apple signing certificate.

We've fixed a few more bugs in the spectrum displays - let us know what you think!

Ratings and Reviews

3.9 out of 5
44 Ratings

44 Ratings

Advert H8R ,

The Best I’ve Found!

Listening to music thru iTunes via multiple iPhones over the years & regardless of the type or brand of headphones/earbuds that I would be using at that time, the music just was never loud enough, as far as just for my own personal desire.
And so, I figured there had to be an app out there, whose main purpose would be to amplify music for earbuds etc. And I found Louder Logic. And having tried various other apps, that made similar claims & whose purpose was also the same, I can honestly say that none of them ever really came close to fulfilling their purpose quote as completely, as Louder Logic, does.
Other apps are too much boost, and therefore, distort the music badly & so forth. But all in all, Louder Logic, in my experience, is actually by far, the best one out there.

mbowyer1 ,


At least for me... lots of negative reviews but it has worked perfectly for me for years- every feature! I like choral and organ music and they are often hard to appreciate in areas with high ambient noise. LL brings up the Volume significantly without distortion. Five stars!

CNTxFan ,

Really slow

I have used the free version of this app for a couple of years, and really appreciated how well it did sound leveling. I decided to upgrade to the paid version, and have not been happy since I did that. It sometimes takes at least 45 seconds to start up, and occasionally it is still trying to load the library after two or three minutes, so I have to quit the program and restart. Not sure I made a good decision on paying for the upgraded version.

App Privacy

The developer, McDSP, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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