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;
-- Speech recognition - FREE;
-- Support of Bluetooth headsets and Air Pods* - FREE.
-- Compatibility with HealthKit - your audiogram will be stored/read in -- HealthKit to enable you to control your hearing changes and will allow to provide you with customized hearing enhancement - FREE.
-- Autorun with recent settings
-- Use the headset button to control the application (push it once to turn your profile on or off, push it twice to switch the microphone)

-- “Super Boost” - powerful sound amplification – TRIAL;
-- Using the built-in 4-week adaptive course for getting used to the hearing aid - 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 2.9.5

In the 2.9.5 we improved the app stability and fixed crashes.
Hearing test changed.
Keep your feedback coming! Write us at and one of our friendly bunch will get back to you.

Ratings and Reviews

4.2 out of 5
839 Ratings

839 Ratings

Mitos75 ,

Great help, for when needed

I have lost some of my hearing but not to the point to get some hearing aids, This app test and calibrate exactly what I need when I needed. Thumbs Up for that.
I leave it a four starts as when I move through applications the app automatically turns off when I needed to stay on. Perhaps the developer can fix this bug. Other than that. THANK YOU!

Kmccnf ,

I loved until....

When I first installed this app it was wonderful. It was a music player and hearing aid app all together. It was wonderful, I set up the profile and was able to listen to my music with the eq set up for my hearing loss. It was like rediscovering my music collection. I honestly didn’t use the actual hearing aid app because When not using headphones I had my own hearing aids. When listening I just selected the profile for the headphones I was using.

Then everything changed. In one update they separated the music player from the hearing aid app. While the music player worked with the selected profile, if I changed headphones (and yes there are difference) I had to leave the music app and open the hearing aid app to make the change. I don’t think it was intended that but the button I assumed would be for that purpose was grayed out. Not the best but sill usable. Though i would have helped if that upgrade had not wiped out my profiles. Then they did another upgrade. Great, I thought maybe they fixed that problem. Nope, it was worse. Now the music
Player would only play one song at a time. No matter what I did to the settings I could not get
to advance to the next song automatically. I finally deleted it. It was just too much trouble.

Developer Response ,

Now we are preparing to release a new version of the music player with the correction of a number of problems. Stay with us.

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?


Monthly Access
One-month access to application functionality
Free Trial


68.4 MB

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


English, Arabic, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Persian, Polish, Portuguese, Russian, Simplified Chinese, Singhalese, Spanish, Thai, Turkish, Vietnamese

Age Rating
In-App Purchases
  1. Weekly Access $4.99
  2. Monthly Access $15.49
  3. Annual Access $74.99


  • Family Sharing

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

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