Petralex Hearing aid will automatically adjust to specific features of your hearing.
Use the power of your smartphone and latest technologies for maximum sound amplification.
No registration and no advertisements.
You only need a simple headset in order to use it.

Hundreds of thousands of people have chosen Petralex to solve their hearing problems.
The application was chosen as Microsoft Inspire P2P contest winner in 2017.

-- Automatic adjustment to hearing specifics - FREE;
-- Hearing correction for each ear - FREE;
-- Adaptation to different types of environment - FREE;
-- Full acoustic amplification up to 30 dB with a wired headset - FREE;
-- Built-in hearing test - FREE;
-- Amplification of quiet sounds without losing the overall volume (dynamic compression) - FREE;
-- Using 4 options of sound amplification - FREE;
-- Using the built-in 4-week adaptive course for getting used to the hearing aid - FREE;
-- Speech recognition - FREE;
-- Support of Bluetooth headsets and Air Pods* - FREE.

-- “Super Boost” - powerful sound amplification – TRIAL;
-- Players with sound amplification – TRIAL;
-- Ability to create an unlimited number of profiles for different sound situations – TRIAL;
-- Regulated noise suppression – eliminates background noise, increases speech intelligibility – TRIAL;
-- Modern Dectone amplification method which amplifies even better – TRIAL;
-- Profile editing – fine adjustment of hearing aid – TRIAL;
-- Amplification formula for quiet sounds in case of tinnitus – TRIAL;
-- Additional applications with sound amplification – TRIAL;
-- Audio recorder/Dictaphone with amplification and personalization of sound to your hearing – TRIAL.

How the Subscription Works:
- Subscribers get full access to ALL FUNCTIONS OF THE APPLICATION;
- All recurring subscriptions will auto-renew unless auto-renewal is turned off at least 24 hours before the end of the current period;
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase;
- Your subscription is for your iTunes account and can be used on your iOS device;
- Payments will be charged to your iTunes account at confirmation of purchase;
- Subscriptions cannot be cancelled during the active subscription period.

Choose from one of the following subscription options:
-- weekly subscription
-- monthly subscription
-- annual subscription

-- Adaptation to any hearing aid takes from several weeks to several months;
-- You will hear sounds and noises that you have not heard before. Use the built-in noise reduction function;
-- Some familiar sounds can acquire with metallic aftersound, which can cause temporary discomfort;


Hearing aid slows down the development of dementia by 75%.

*Using Bluetooth
NOTE! Using Bluetooth headset brings additional delay to sound transmission.
Possible echoing can appear.

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.

Have questions, feedback or suggestions? Reach out to us at

Read more about our terms and conditions here:
- Terms of service:
- Privacy policy:

What’s New

Version 2.8.2

In the 2.8.2 we improved the app stability and fixed crashes.
New feature with even more volume boost - “Super Boost“.
Players with sound amplification .
Keep your feedback coming! Write us at and one of our friendly bunch will get back to you.

Ratings and Reviews

4.3 out of 5
799 Ratings

799 Ratings

drfoster1999 ,


Doesn’t work with Bluetooth and that’s almost always my preference making almost impossible to use
I’m currently using a Plantronics Explorer 52. I wear many hats so I’m physically extremely active making in out of the question to wear wires. I can be somewhat certain at the end of a day my Bluetooth will still be with me but just barely. No, I cannot pass a hearing test so that even the type of Bluetooth can significantly affect my ability to do my job. Hearing aids cost 4 times more than my iPhone X and the performance difference would be like comparing a Harrier Jet to a balsa wood toy airplane So aggravating. I’ve purchased roughly $12,000 worth of hearing aids and had hell getting them to last more than 6 months. They just try to make you believe that what you paid $4000 for 6 months later is out of date. No lie, it’s pathetic

Developer Response ,

What wireless headset do you use? (manufacturer, model, type)
What is the problem?
Can you pass a hearing test?


Work great!.. but the volume thing...

So first I’d like to start off by saying that this is a great application and it works wonderfully and I’ve used it with Bluetooth devices almost flawlessly.

Now that we’ve got that out of the way, lets talk about this volume notification… if you decide to turn the volume down while using the application, a very loud voice comes on screaming at you(or at least that’s the best imagery i can give to exemplify the issue) to turn it back up or risk reducing the applications effectiveness. I understand that ideally you would want the volume turned all the way up... however, as a user I would like the option to freely adjust the volume without being harassed…

It’s absolutely intrusive an annoying! Please fix this!

1/2 loss ,

Please fix for iPhone Xs

This app works wonderfully on my iPad Pro which has new and updated operating system. I sue it for restaurants and theatre.
However, my iPhone Xs has problems with the balance. It is either going if off and on or switching which ear. Since I have hearing loss in only one ear, I have the app set to have all sound go to my left earbud. It’s fine with iPad Pro, but not with IPhone Xs. It is NOT my phone as I recently traded one iPhone Xs for another iPhone Xs. Your app, even with hardwired earbuds, does not work properly with the Xs. Please, Please, Fix. I love the app, but don’t want to lug around my iPad Pro.

Developer Response ,

You just need to create an audio profile, just for one ear. Pass the test on one ear only, and just skip the second test. Sound processing will be carried out only in one channel.


53.2 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish

Age Rating
Rated 4+
In-App Purchases
  1. Weekly Access $3.99
  2. Monthly Access $12.49
  3. Annual Access $59.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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