# Acoustic Picture Transmitter Pro

> Transmit and receive images acoustically using sound waves. (iPhone/iPad app by Dominik Seibold.)

- Source: https://appshunter.io/ios/app/acoustic-picture-transmitter-pro/id416707027 (this page in markdown: same URL + `.md`)
- Developer: [Dominik Seibold](https://appshunter.io/developer/354153084)
- Category: Photo & Video, Entertainment
- Price: Free
- Rating: 4.10/5 from 31 App Store ratings · 38 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.0 · 1 MB
- Languages: American English
- Released: 2011-02-01
- Data updated: 2026-08-20
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/acoustic-picture-transmitter-pro/id416707027/reviews.md

## What is Acoustic Picture Transmitter Pro?

With APT you can transmit and receive images acoustically. To do this each column of the selected gets transformed by a Fast Fourier Transform and outputed through iPhones speaker. On the receiving iOS-device the received audio is visualized by a spectrogram and the incoming images get visible. You can use this app for example to transmit images very easily over a phone or to put images in every kind of audio recording.

The pro-version has the additional features of choosing between two coding methods, choosing between linear and logarithmic frequency scale and the ability of sending the resulting audio as email. Also, the pro-version isn't ad-supported.

## Key features

- Acoustic image transmission
- Image data to audio conversion
- Spectrogram visualization
- Multiple coding methods
- Linear and logarithmic frequency scales
- Email audio output

## Recent user reviews (10 of 38)

All indexed reviews: https://appshunter.io/ios/app/acoustic-picture-transmitter-pro/id416707027/reviews.md

### 5/5 — Please

*2026-06-09*

And Thank-You… :-)

### 2/5 — app crashes

*2024-06-29*

crashes when attempting to share sounds or load images

### 4/5 — more features

*2024-01-29*

this app is amazing and almost a way to visualize wifi networks, how ever it could have a few more features. encoding color data or an option to use some form of audio encryption would be cool, to encode and decode audio realtime

### 5/5 — Incredible

*2023-12-23*

This is one of the coolest apps ever and it’s so awesome that it’s truly free and it only takes up a single digit amount of megabytes!

### 3/5 — Need bugs fixes

*2023-09-30*

需要兼容

### 5/5 — A hidden jewel of an app.

*2022-01-15*

I really hope this app still has support. I don’t know if there are any others out there like this. I especially like the frequency selection so I don’t blow ears out. But I have some cool ideas for this. I’ve been messing around with a lot of random sounds to just to see what comes out of it.

### 5/5 — Top Notch

*2020-11-26*

Very Nice

Does what it says!   Very useful.

Any chance of opening up the source.

### 5/5 — Amazing and works great!

*2020-10-17*

It is uncanny how good the image quality is, and a little bit eerie, although highly scientific in actuality.

### 2/5 — Camera Malfunction(?) Reloaded /iOS 13

*2020-04-22, version 1.1*

Would have liked to give this a great review, but the only function working was sending a picture from library and the audio play.  The camera function did not work, no picture black screen, I reloaded reinstalled, the camera function showed now a sunshine or lighten brightened which stayed in black screen my guess is that the picture facing function pivot button doesn’t work.

A Suggestion:  I would prefer it allow the person to permission the camera as they have set, not use the program screen to do that part.  In doing so, perhaps we can bypass this problem?

Please message me, if there is a way to fix this problem.  Thank you for the trial application.  I once used a very good model to make spectrogram, in same app. We can also send and receive, but the image it made, we could simply change the pivot screen on our camera setting for selfie example shot and save to our library.

### 5/5 — It’s 1963 again!!!

*2019-09-23*

This technology was used by NASAs satellites to transmit images, taken in space, back to earth.
The principle behind that system is used in this phone app. Very cool. I now use it to broadcast images through my radio set to radio listeners across the country! Fun fun!

## Frequently asked questions about Acoustic Picture Transmitter Pro

### What does Acoustic Picture Transmitter Pro do?

This app allows you to transmit and receive images acoustically. It converts image data into audio signals that can be played through your device's speaker and then reconstructed into an image on a receiving device. This enables discreet image sharing or embedding visuals within audio recordings.

### What are the key features of the Pro version?

The Pro version offers advanced options like choosing between two coding methods for data transmission, selecting between linear and logarithmic frequency scales for audio output, and the ability to send the resulting audio file via email. It also does not include advertisements.

### How is this app monetized?

Acoustic Picture Transmitter Pro is a paid application. It does not feature in-app purchases or advertisements, providing an uninterrupted user experience.

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

Users can employ this app to easily transmit images over a phone call or embed visual information directly into any kind of audio recording. It's useful for situations where traditional file sharing might be inconvenient or impossible.

### Is this app compatible with all iOS devices?

The description states that the app works on receiving iOS devices, implying compatibility with iPhones and potentially other iOS devices capable of playing audio and processing the incoming signals. Specific version compatibility is not detailed but it is designed for the iOS ecosystem.

## Version history (last 2 releases)

### 1.1 — 2015-03-24

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

support of iPhone 6 and iOS 8

### 1.0 — 2011-02-01

No release notes.

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## More apps by Dominik Seibold

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- [aremaC](https://appshunter.io/ios/app/aremac/id488626205)
- [iPCamera - High-End NetworkCam](https://appshunter.io/ios/app/ipcamera-high-end-networkcam/id570912928)
- [Fokus Pokus](https://appshunter.io/ios/app/fokus-pokus/id928926951)

All apps by Dominik Seibold: https://appshunter.io/developer/354153084

## Related topics

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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 2026-08-20.*