Hearing Aid APP:PETRALEX 4 EAR

In-app purchases
4.5
15.4K reviews
1M+
Downloads
Content rating
Everyone
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About this app

Petralex - Personal Audio Amplifier & Sound Enhancer

Petralex transforms Android smartphone into a sophisticated audio amplifier & hearing app companion. Enjoy MUSIC BOOST with 3x AMPLIFIER, personalized settings, clear sound, noise reducer & built-in hearing test. Petralex — advanced SUPER HEARING app.

# Key Benefits

● Personalized Sound – Adapts to your unique audiogram or hearing profile.
● Award-Winning Tech – Microsoft Inspire P2P Winner (2017).
● No Ads, No Sign-Up – Just plug in and enjoy improved clarity.
● Trusted by 4.000.000+ Users – Join a GLOBAL COMMUNITY focused on better listening.

# FREE Features You’ll Love

‣ Custom audio adjustment per ear – INDIVIDUAL LEFT/RIGHT BALANCE to amplify precisely.
‣ Intelligent environment adaptation – From SILENT SPACES to BUSY AREAS.
‣ 30 dB Audio Enhancement – ⌘ FOR MINIMAL LATENCY, WIRED HEADSETS ARE SUGGESTED.
‣ Built-in audio calibration tool – CREATE YOUR PERSONALIZED SETTING in MINUTES.
‣ 4 Audio Modes – DISCOVER YOUR FAVORITE STYLE for optimal listening.
‣ Bluetooth & wired connection – NOTE: BLUETOOTH might introduce MINOR DELAY.
‣ Remote Microphone Function – TRANSFORM YOUR PHONE into a PORTABLE MICROPHONE.
‣ Live Audio Capture – MORE EASILY PERCEIVE CONVERSATIONS in YOUR SPACE with this live listen feature.

# PREMIUM Upgrade (7-Day Free Trial)

Access advanced audio features with:
■ Maximum Boost Setting – EXTREME AUDIO ENHANCEMENT to amplify significantly.
■ Advanced Noise Reducer – MINIMIZE AMBIENT NOISE effectively.
■ Unlimited Custom Profiles – STORE SETTINGS for EVERY SITUATION.
■ Comfort Audio Mode – SOFTER, MORE PLEASANT SOUND.
■ Advanced Dectone Technology – PRISTINE and AUTHENTIC AUDIO.
■ Voice Capture Feature – RECORD SPEECH with IMPROVED CLEARNESS.
■ Media Player with Adaptive Boost – CUSTOMIZE PLAYBACK to YOUR SETTINGS.

● NEW: Concurrent audio capture – RECORD while ENHANCING AUDIO LIVE.
● NEW: Speech-to-text conversion – RECEIVE IMMEDIATE TRANSCRIPTS of DIALOGUE.
● NEW: Playback of stored media with your PERSONAL PROFILE – COMPATIBLE with DEVICE STORAGE, DROPBOX, GOOGLE DRIVE, or WIFI SHARING.

# Flexible Plans (Cancel Anytime)

◆ Weekly – NO-RISK EVALUATION PERIOD for this hearing app.
◆ Monthly – IDEAL for TEMPORARY USE.
◆ Annual – MOST ECONOMICAL CHOICE.

⌘ ADAPTING TO AUDIO ENHANCEMENT APPLICATIONS REQUIRES PATIENCE! PLEASE NOTE:

Adjustment may occur over SEVERAL WEEKS.
You might perceive AUDIO DETAILS PREVIOUSLY UNNOTICED – utilize the INTEGRATED NOISE REDUCER.
Certain sounds could initially appear UNFAMILIAR – this SENSATION TYPICALLY FADES.

FOR A SMOOTHER ADJUSTMENT, USE THE INCLUDED 4-WEEK GUIDED PROGRAM.

⌘ Important Notice:
The Petralex application is an audio enhancement tool. IT IS NOT CERTIFIED AS A MEDICAL DEVICE, HEARING AID APP, OR SUPER HEARING SOLUTION.
The included audio calibration tool (similar to a basic hearing test) helps create a personal audiogram for app settings ONLY. IT IS NOT A SUBSTITUTE FOR PROFESSIONAL HEARING ASSESSMENTS conducted by a qualified specialist (an ENT consultation is advised for hearing health concerns).
This service offers a FREE 7-DAY EVALUATION — sufficient to determine if you wish to PROCEED or DISCONTINUE using this hearing app. Refunds ARE NOT PROVIDED once this trial period concludes.

Questions, feedback or suggestions? Contact us: support@petralex.pro

For further details:
Terms of service: petralex.pro/page/terms
Privacy policy: petralex.pro/page/policy

◆ REDISCOVER THE DETAILS IN YOUR AUDIO – EXPERIENCE PETRALEX NOW!
Updated on
Jan 13, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity and Device or other IDs
Data isn’t encrypted
Data can’t be deleted

Ratings and reviews

4.5
15K reviews
A Google user
February 17, 2019
I have otosclerosis with tinnitus. This app works better than any real hearing aid device that I've used. Using the microphone on the phone, rather than the headset, is genius. The phone then becomes a remote mic that, for example, I can place in the center of the boardroom table during meetings. The slight audio delay is mildly disconcerting, but not enough to lose a star!
296 people found this review helpful
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Dan Browning
November 19, 2024
This app works great with Samsung Ultra 23S and Shokz Bone Conduction Headphones. But there is a latency using the Bluetooth headphones. It works well for TV and Meetings where your phone can be placed in a good location. The one thing that I don't like is that the developer has no way to be contacted. I would like to switch from the monthly plan to an annual plan to save some money and I feel like the software is worth it. It would be nice to have a pathway to convert your subscription.
57 people found this review helpful
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Amanda B.
January 9, 2026
well I'm not the type to prejudge or leave a review without any really info.. don't normally mind paying for apps either. but so day I've gotten nowhere but mad at this (and other similar apps).. -thought it was free, but nope.. -had to rate before it even tried working.. -then still no luck with it being useful or boosting audio -every click another attempt to get you to subscribe. conclusion.. deleted before even had my normal audio coming out of my headphones
2 people found this review helpful
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What’s new

Built-in Music Player for HEARING-impaired
Enhanced dynamic compression to AMPLIFY quiet sounds
Added LIVE TRANSCRIBER — speech-to-text in real time
Thank you for your feedback — we keep improving!