Release Notes

What’s New

The latest updates, improvements and bug fixes for Petralex on iOS and Android.

NEW
Version 4.8.2 Latest
March 2025
New
Live Listen mode now supports AirPods Pro 2 Adaptive Audio — profiles blend automatically with environment.
Added quick-switch widget for Control Center to change hearing profiles without opening the app.
New hearing profile presets: Restaurant, Outdoor, Theatre and One-on-One conversation.
Improved
Noise suppression algorithm updated — cleaner speech separation in crowded environments.
Hearing test is now 30% faster with the same accuracy.
iCloud sync is more reliable and works in background.
Fixed
Fixed audio dropout when switching between Bluetooth devices mid-session.
Fixed crash on iPhone 15 Pro when opening Settings during active amplification.
Fixed profile icon not updating after renaming.
4.7
Version 4.7.0 Major
November 2024
New
Completely redesigned hearing test flow — cleaner UI, progress indicator and faster calibration.
Dynamic Range Compression control — fine-tune the balance between quiet and loud sounds.
Profile sharing via AirDrop — send your calibrated profile to family members.
Improved
Acoustic feedback suppression is now adaptive — responds in real time to microphone proximity.
Signal processing delay reduced to under 5 ms on iPhone 14 and later.
Fixed
Fixed audio interruption when receiving a phone call while Petralex is active.
Fixed an issue where the frequency equaliser would reset after app restart.
4.6
Version 4.6.1
August 2024
Performance
Optimised battery usage — up to 20% longer session life in background amplification mode.
Reduced memory footprint on devices with 3 GB RAM or less.
Fixed
Fixed a rare issue where the app would not resume after an incoming Siri request.
Fixed microphone permission dialog not appearing on fresh installs on iOS 17.
Fixed localisation issues in Japanese and Korean UI.
NEW
Version 5.2.1 Latest
March 2025
New
Added persistent notification with one-tap access to switch hearing profiles without unlocking your phone.
Support for Android 15 and new Bluetooth audio policy — eliminates delay on Pixel 8 and Samsung S24 series.
New Quick Settings tile — toggle amplification directly from the notification shade.
Improved
Microphone handling rewritten — better compatibility with Samsung One UI 6 and Xiaomi HyperOS.
Wired headset detection is now instant — no more 2-second delay after plugging in.
Fixed
Fixed echo on Bluetooth HSP profile when ambient noise suppression was enabled simultaneously.
Fixed app crashing on Android 14 when microphone permission was revoked while active.
Fixed equaliser sliders becoming unresponsive after rotating the screen.
5.1
Version 5.1.0 Major
October 2024
New
Material You design — app now adapts to your Android wallpaper colour palette on Android 12+.
Lock screen widget to switch profiles without unlocking the device.
Added NAL-NL2 amplification formula alongside existing NAL, Berger, POGO and Petralex.
Fixed
Fixed compatibility issue with MIUI 14 that caused the microphone to stop working after 30 seconds.
Fixed profile list not scrolling correctly on devices with display cutouts.
5.0
Version 5.0.0 Major
May 2024
New
Complete UI redesign — cleaner layout, larger controls, improved accessibility.
Petralex AI Profile — automatically suggests the optimal amplification settings based on your environment.
Dark mode support.
Performance
Audio processing pipeline rewritten from scratch — algorithmic delay down to 6.3 ms on modern devices.
Startup time reduced by 60%.