Petralex Hearing Aid

Last modified
Wednesday, October 4, 2017

Description of App

"Petralex ® is a hearing aid application based on iPhone or iPad, running same principles as conventional wearable hearing aid. Auto-adjusting to your personalized profile, completely invisible to anyone - use it with ordinary headset!

Using iPhone or iPad powerful hardware with our patented algorithms and user-friendly interface with fast profile selection brings maximum sound quality and comfort of use.

Benefits of Petralex ®:

- Easy to use - no special devices, no battery replacements or all-day wearing annoyance;

- Quick Setup for any sound environment;

- Increased sampling rate - 44.1 kHz, providing the best sound quality;

- Easy switching between device and headset microphones;

- Full acoustic gain up to 30 dB with a standard headset;

- Calculated minimum signal processing delay - just 6,3-15,7 ms (depending on the model);

- Use the built-in mic to catch sound from distant sources, i.e. in classroom, at theatre (or use it as a spy-ear!);

- Easy profile sync for all of your iOS devices with iCloud support;

- Setup and adjust the app without visiting a specialist.

- BT headset support (for processed sound playback only, sound is captured by device onboard mic).

You can compare the original and processed sound test phrases on our site Petralex

Petralex® Hearing Aid is absolutely free to use because of your support. If you find the app useful, please support developers with donation at

The Petralex® app is not approved as a medical device or software and cannot be used as a hearing aid with doctor`s prescription.
Audiometric test provided in the application can be used only for app adjustment. Testing results are not a substitute for professional audiology tests and cannot be considered as a basis for diagnosis.

Keep in touch: "



Free or Paid


Apple Watch Support

Not Known

Device(s) App Was Tested On


iOS Version


Accessibility Comments

This app, I have found, is actually quite accessible. There are a few buttons that aren't clearly labeled, but they don't seem that significant to the operation of the app. Also, sometimes the labeling of the interface can be slightly confusing, but, again, nothing major. In the Hearing Test portion, you may want to turn off VoiceOver before doing it because you have to turn the volume all the way up and you need to respond to the sound pretty quickly (the button to press is very near the bottom of the screen and is very easy to activate without VoiceOver). Also, unofrunately, when you turn the aid volume up, VoiceOver volume seems to go up as well, so it might be a good idea at least to turn off speech when using this app.

VoiceOver Performance

VoiceOver reads all page elements.

Button Labeling

Most buttons are clearly labeled.


There are some minor accessibility issues with this app, but they are easy to deal with.

Other Comments

This app is good for DeafBlind users either with minor hearing loss who don't need a hearing aid all the time or only need it in specific situations. It is also good for DeafBlind people who simply may not have the funds for a traditional hearing aid.


1 people have recommended this app

Most recently recommended by Misty Dawn 5 years 3 months ago


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