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uListen - Sound Amplifier

By Applied Voices LLC

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This product should always be used with headphones.

Adjust the volume of your friend's voices. Listen to the sound of a pen writing on paper!

uListen is an adaptive sound amplifier. Used with headphones, it can make everyday sounds picked-up by your phone's microphone sound louder or softer. This is great for TV sounds, for making friend's voices seem louder or softer, or for listening to sounds around your house.

This app can also turn your iPhone into a sound probe that lets you explore the microscale sound world in your home and office. Listen to the sound of a pencil writing on paper, or of an Apple being sliced!

Adaptive volume reducer permits you to turn up the amplifier gain to hear soft sounds, without experiencing an unpleasantly loud sound if someone starts talking or a loud sound occurs. This selective amplification mode makes soft sounds louder, while making loud sounds softer.

Automatic functions can be switched off, providing direct manual control of amplification level via a thumb slider.

uListen is an entertainment application, not a hearing aid. uListen should never be used for medical purposes, and should not be used to receive emergency communications.

uListen requires headphones. It works best on iPhone with headphones that do not have a microphone built-in. Use on iPod Touch 2nd generation requires external Apple earbud microphone accessory. iPod Touch 1st generation is not supported.

What's New in Version 2.0

Eliminated all advertising.
Compatibility with iPod 4, iPhone 4G, and iPad.
Added master volume control slider
Audio latency improvements
Gradual ramp-up of volume level when controls are adjusted
iOS 4.2 compatibility

iPhone Screenshots

iPhone Screenshot 1
iPhone Screenshot 2

Customer Reviews

Works well

Seems that most bad reviews are from people not following instructions or not using the app for its designed purpose.

Connect some noise canceling headphones and turn it on. You have to flip the switch in the app. You'll hear the tiniest noises. Yes, there is a slight delay which is expected.

A few additions requested

Would like to see this app compatible with wireless headphones. Then it will be 5 stars.


I *thought* the app was designed to boost the sound output on your iPhone speakers - wrong!

Instead, it just amplifies the ambient noises in the room, etc.

Doesn't increase the volume of any music output
It's like some bionic ear...if you need one
Must use headphones, but not the one that came with your iPhone
Way too expensive for what it claims to do
Save your money and get a different app

Apps like these are the reason we should have a 24 hour period to return apps to the App Store.

uListen - Sound Amplifier
View in iTunes
  • $8.99
  • Category: Health & Fitness
  • Updated:
  • Version: 2.0
  • Size: 4.1 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 3.1 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: