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.
You only need a simple headset in order to use it.

-- automatic adjustment to hearing specifics;
-- hearing correction for each ear
-- adaptation to different types of environment;
-- full acoustic amplification up to 30 dB with a wired headset;
-- built-in hearing test;
-- amplification of quiet sounds without losing the overall volume (dynamic compression);
-- using 4 different options of sound amplification

-- using a smartphone as a remote microphone while using Bluetooth headset for watching TV, etc.;
-- transfer between one iOS device to another through iCloud service support;
-- export of individual settings for Dectone hearing aid application;
-support of Bluetooth headsets*

*Using Bluetooth
NOTE! Using Bluetooth headset brings additional delay to sound transmission.
Possible echoing can appear
The developer of the application cannot guarantee that the quality of the application functioning with a Bluetooth headset will be comparable to the quality of the application functioning with a wired headset due to specific features of Bluetooth standard.

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.

**Subscriptions pricing and terms:
Petralex® offering four auto-renewable subscriptions:
-- weekly subscription
-- monthly subscription
-- 6 months subscription
-- annual subscription

- Payment will be charged to iTunes Account at confirmation of purchase
- Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
- Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase
- Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

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

What's New

Version 2.1.0

Fixed bugs

Ratings and Reviews

4.3 out of 5
651 Ratings
651 Ratings

Helps me hear…WOW!!


After only two weeks of testing Petralex in various settings, I find it outstanding. Let’s me hear the folks at my table for the first time in years. Looking forward to many new adventures using my ‘new’ ears. HalR
[My lengthy, accurate, useful review was discarded by someone at Petralex who made up their PR review and published it in my name. Please print my original review.

Nonetheless, Petralex is an excellent development in the ‘science’ of hearing. I wear my earPods all day long.
the real HalR

This is amazing


My father’s expensive hearing aids were very touchy and often stopped working. He’s has severe hearing loss and wasn’t able to communicate without his aids. I downloaded this app and it saved him from isolation and loneliness. He can hear again. This app is free so you have nothing to lose to try. For people complaining about app, it has to be the individual’s hearing.
Note: we did not try Bluetooth

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!


16.4 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish
Age Rating
Rated 4+
In-App Purchases
  1. Weekly Access $1.99
  2. Three Months Access $12.99
  3. Monthly Access $6.49


  • Family Sharing

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

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