Try it, it's free,  you will not be disappointed. 

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.  (Check out Artone headset for Petralex. ) 

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.

FEATURES:
-- 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;
-- Support of wireless headsets* - FREE.

PREMIUM SUBSCRIPTION OFFERS ADVANCED POSSIBILITIES:
-- “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.


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

Disclaimer:
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.