Equalizer 4+

The Best Parametric EQ

Audioforge Labs Inc.

Designed for iPad

    • 3.3 • 125 Ratings
    • $3.99


"... the sound quality blew us away."- Gearburn.com
Music player with the most powerful and acurate equalizer in the app store as well as the most advanced playlist controls.

+ Play music directly from your Music Library including podcasts and music video (audio only)
+ Adjust the powerful parametric equalizer by moving the seven control points or type in the values directly.
+ Adjust the EQ curve for your left and right ear separately (now extends from -30 to + 30 dB. Use the StereoEQ setting for that)
+ Select from over 10 presets or save your own. You can even share them via email and import presets from other people via email.
+ Full background support including remote control (from docks, headsets, car stereos)
+ Visualize the music with the spectrum analyzer.
+ Use AirPlay to listen on your AppleTV, or your Bluetooth headsets and even a dock.
+ Use the pre-amp slider to adjust the overall boost or cut. Make sure to turn the slider down if you experience distortion. Use the auto-normalizer function to prevent clipping automatically and have the best dynamic range possible with your eq curve. (on/off in settings)
+ Curve screen: curve redraws as controllers are dragged. Pinch to modify Q. Three stage clipping signal on preamp slider. Keyboard entry for pre-amp. Twitter/Facebook/Weibo integration to share your current EQ curve. Bypass.
+ Crossfade between songs. Make sure to stop the music before changing the crossfade time slider.
+ Now playing screen includes repeat (all, single no repeat) button and shuffles like the music app. Improved stability of on the fly modifications of the playlist. Add more songs to the playlist at any time. Sort playlist alphabetically.
+ Music selection is very similar to default music app.
+ Turn landscape to display the frequency analyzer.
+ Built in sleep timer to stop Equalizer after a certain period if time.
+ Crossfeed option to blend audio between channels
+ Apple Watch support for eq curve selection incl. complications

No known issues. please contact support if you have any problems.

Equalizer will not play copy-protected (DRM). You need to convert DRM songs. Apple Music Streaming uses copy-protected songs.

Only the Apple Music app can manage songs in iCloud (iTunes Match). You will need to make sure the songs are downloaded to your device to listen and enhance them via Equalizer. If you want to stream and eq your music, you can try our other app: CloudEQ. It allows you to stream and eq music from SoundCloud and your Dropbox account without the need for storage on your device.

From the reviews:

I connect my iphone 4 to a car audio system, with the application the music began to sound incomparably better ....
A little clear interface, but to understand it and understand need no more than 5-10 minutes. -- P_S_B_
This is the EQ I have been looking for, and because of bad ratings I almost passed on it! I consider myself an aspiring audiophile and have the equipment -- Klipsch, Sunfire, Nottingham, Denon, Paradigim, etc. -- (and debt) to back it up. This EQ performs flawlessly and is very easy to use. It enhanced my music dramatically. Yes, dramatically! Just make sure you are running the recommended IOS, as the developer suggests. -- J. Paul DiMaggio

PLEASE if you have concerns or encounter problems with the app: post on http://www.audioforge.ca and we will explain how things work, until you can use all the features of the app to the fullest. Thank you

What’s New

Version 5.18

Bug Fixes fo iOS 17

Ratings and Reviews

3.3 out of 5
125 Ratings

125 Ratings

defepitaph04 ,

Great EQ, plays all my ALAC, WAV, etc, but buggy and unstable

The EQ is very flexible and responsive and the app is full of options but interface is very clunky and not very responsive or intuitive. Often times music will pause on its own or when I select a song, the app will play a different song instead.

This is my favorite music app so far but those bugs are very frustrating and it’d be much easier to overlook the funky interface. When it works it works great! But currently am auditioning other music apps..

Indyblrmkr ,


I have tried many music programs to get my music to sound the way I like it with my superbeat pros. This program is by far the best. Hands down! I don’t know what the problem is with the people on here talking about bugs and problems. I’ve had no probs whatsoever. Been using for well over a year and I love it. Worth way more than what it cost me. I’ve found that the crossfeed is best at -13. It makes instruments sound like they are on the stage and that the singer is in your head. I love it. On the “stereo” setting, you can slide back and forth for 2 EQ’s. One for left ear and one for right ear. For people with more hearing loss in one ear more than the other this is a miracle. You can actually set it identical but all up just a bit and it sounds like your ears are perfect. Anyway, if your thinking about buying this app, don’t hesitate, just buy it. No regrets here. I can access all of my music from my library. iTunes and ones I’ve downloaded myself. As long as it’s in MP4, it will work and in iTunes, you can convert all MP3’s or wav’s and lots of other sound ext’s to MP4. Its really easy to figure out.

Chazzzor ,

Great Equalizer and Music Player

I confess I run the equalizer at flat. But what I love is the Cross-Feed provision. If you use headphones you are probably aware that the music usually sounds like its spatially inside your head - Which is nothing like you get from external stereo speakers. The crossfeed control (under the gear “settings” introduces a little left into right and right into left to compensate for the unnatural stereo separation you get from headphones or earbuds. In my case I find that setting the cross-feed to -12% sounds great in my headphones. The lead singer is inside my head spatially and the rest of the band is usually around me - I much prefer this to having all the sound sources spatially inside my head with headphones.

The other thing I really like is that it has an effective auto-level function that helps to compensate for the different volume levels between my music tracks.

I use this on my iPhone and iPad and it seamlessly imported all my music and playlists from Apple’s Music Player. Now if I am using headphones or earbuds I play my music with this App instead of the Apple Music Player.

App Privacy

The developer, Audioforge Labs Inc., 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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