# Amplitude

> Amplifies distant or quiet sounds using iPhone/iPod Touch hardware. (iPhone/iPad app by Gripwire.com.)

- Source: https://appshunter.io/ios/app/amplitude/id307580587 (this page in markdown: same URL + `.md`)
- Developer: [Gripwire.com](https://appshunter.io/developer/305490374)
- Category: Entertainment, Lifestyle
- Price: $1.99
- Rating: 2.39/5 from 118 App Store ratings · 59 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 1 MB
- Languages: English
- Released: 2009-03-28
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/amplitude/id307580587/reviews.md

## What is Amplitude?

Amplitude enhances aural experiences by allowing you to hear distant and/or quiet sounds as if you were standing nearby. Amplitude uses the high quality hardware of the iPhone and iPod Touch* to detect and amplify the faintest of sounds. ***Note: To get the best experience possible, you must use earbuds that do not have a built-in microphone.***

Amplitude lets you adjust the sensitivity of the iPhone microphone to amplify sounds from across a room. You’ll hear things you never would have been able to hear otherwise.

Using Amplitude is easy: simply launch the app, point your device in the direction of the sound you want to amplify, and starting hearing the world in a new way through your headphones. Individual controls enable you to adjust the microphone sensitivity or mute the sound amplifying feature altogether.

Use Amplitude to explore your world. Experience all the sounds of your environment that you would otherwise have missed.

Experience Nature and Wildlife More Intimately

- Have you ever heard the sound of a hummingbird’s wings beating back and forth? It’s pretty interesting to hear even with unaided ears. Using Amplitude, it’s a truly amazing experience.

Experimenting Around Your World

- Listen to your heartbeat for the first time

- Diagnose the source of that annoying squeak in your new car. 

- Attach a cup or small plastic bowl to the end of your iPhone to focus the incoming sound and expand your range

- Place microphone against a office wall to hear sounds from all over the building.


At Sporting Events 

- Baseball: Listen to the first base coach, the players in the dugout and the player in the batting circle.

- Golf: Hear golf pros discuss the next shot with their caddy.

Amplitude Benefits:

- Turns your iPhone or iPod Touch* into a sound amplifier

- Hear sounds through thin walls or doors

- Adjustable microphone sensitivity / boost

- Adjustable volume and mute controls

- Independently control the iPhone volume and the microphone sensitivity

- View sound waves on the oscilloscope

*Ear buds are required for use with all devices. Use with the iPod Touch requires a headset with built-in microphone feature.

Tips on Using Amplitude:

- For best audio reception, point the microphone in the direction of the sound you want to pick up. 

- Amplitude controls are oriented upside down from other apps so that the microphone can be pointed toward target sounds.

- To protect against accidental ear damage, Amplitude starts in Muted mode. The “Mute at Start” feature is configurable in the Info screen.

- We recommend keeping device volume between 50-75%.

- Experiment with microphone sensitivity. Some situations will require more, some less.

- To preserve battery life, launch the application and press the device sleep button to darken the screen.

- You can maximize your reception by using your hands or a plastic cup to focus the incoming sound. This is the best method to use when listening through solid objects like doors or walls.

- Like any exposed microphone, the iPhone microphone is sensitive to wind noise. For best results we recommend using Amplitude in non-windy situations. 

- Experiment with different attachments and microphone settings and let us know what works best for you.

Send us feedback and feature requests. We want to hear how you are using Amplitude. Send us your stories or YouTube videos to Amplitude@GripWire.com. This application has been brought to you in association with MagTownTech.

## Key features

- Sound amplification
- Adjustable microphone sensitivity
- Volume and mute controls
- Sound wave visualization
- Hear through walls
- Enhanced nature listening

## Recent user reviews (10 of 59)

All indexed reviews: https://appshunter.io/ios/app/amplitude/id307580587/reviews.md

### 1/5 — Fail

*2021-04-20*

This is a pointless app. It doesn’t work. But it also doesn’t even explain how to make it not work. 
Never use this.

### 1/5 — Trash

*2018-11-12, version 1.4*

Worst app ever!!!!

### 1/5 — Terrible

*2018-02-28*

Don’t waste your money. Doesn’t work.

### 3/5 — Bluetooth?

*2018-01-07, version 1.4*

Is it possible to get Bluetooth support please?

### 1/5 — Junk

*2017-03-15, version 1.2*

This app is crap.. can I get a refund?!

### 1/5 — Doesn't work!

*2016-09-20*

It simply doesn't work! How could this be allowed, want my money back!

### 1/5 — Can I have my 2$ back?

*2016-08-20, version 1.2*

Awful

### 1/5 — Is this a joke?

*2016-05-27*

I can't believe this horrible app made it to the store without some kind of audit being performed to figure out why it doesn't work!  If there is a fix for the nothing but static sound heard I wished I knew it. I bet the creators wished they knew it too!

### 1/5 — Oh my goodness!!!

*2016-03-18, version 1.2*

Shock have read the reviews before I wasted my money. This app does NOT work. Unless you're interested in listening the static, don't do it!

### 1/5 — Mr

*2015-11-21*

Load of donkey bells doesn't work at all

## Frequently asked questions about Amplitude

### What does this app do?

This application enhances your aural experience by amplifying distant or quiet sounds, making them audible as if you were standing nearby. It leverages the high-quality hardware of your iPhone or iPod Touch to detect and boost even the faintest of sounds.

### How do I use the app to hear better?

Simply launch the app, point your device in the direction of the sound you wish to amplify, and listen through your headphones. You can adjust the microphone sensitivity and volume controls to fine-tune the amplification to your preference.

### Is this app free to use?

Yes, this application is available for free. There are no in-app purchases or advertisements mentioned, indicating a completely free user experience.

### What devices is this app compatible with?

The app is designed for iPhone and iPod Touch devices. It requires earbuds for use, and for iPod Touch, a headset with a built-in microphone feature is necessary.

### What are some common use cases for this app?

Users can employ this app to experience nature and wildlife sounds more intimately, listen to sounds through thin walls or doors, diagnose car squeaks, or enhance their experience at sporting events by hearing player and coach conversations.

## Version history (last 5 releases)

### 1.4 — 2018-01-07

This app has been updated by Apple to display the Apple Watch app icon.

Additional fixes for iOS 11.

### 1.3 — 2018-01-02

This version now works on iOS 11.

Sorry about the delay, but we struggled with a silly build related bug that we only figured out today.

Happy New Year!

### 1.2 — 2009-11-11

Fixes
------

- Increased sensitivity
- Bug fixes for slider hot spots


Check This Out!
---------------

Over the past few months, we've been getting great feedback from users about how they are using Amplitude.  One user told us that they attached a commercial grade parabola to their iPhone to focus the incoming sound and enhance the performance focus the app.  Another user wrote to tell us that they did the same thing using an old Tupperware bowl and they doubled the effective listening distance of the app.


These stories are amazing and we want to hear more and share them with the community of Amplitude users!  If you send us a short YouTube video of how you are using Amplitude, we'll feature it on our YouTube site and post it to http://www.AmplitudeApp.com. 


Keep the cool ideas coming and I hope you enjoy this update!

### 1.1 — 2009-06-27

Modified the audio algorithm based upon user feedback.

### 1.0 — 2009-03-27

No release notes.

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## More apps by Gripwire.com

- [QuakeZones](https://appshunter.io/ios/app/quakezones/id352129202)
- [Amplitude Pro](https://appshunter.io/ios/app/amplitude-pro/id438510854)

All apps by Gripwire.com: https://appshunter.io/developer/305490374

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*