Enable "Install from Unknown Sources" in your Android settings.
Tap the notification once the 1.14 MB download is complete. volume-sound-boost-v1.7.3-1.7.3-android-apk-app-1.14-mb
Check the permissions the app requests; a sound booster should only need access to audio settings, not your contacts or location. How to Install the 1.14 MB APK Enable "Install from Unknown Sources" in your Android
Installation is straightforward and takes less than a minute: Obtain the file from a reliable source. volume-sound-boost-v1.7.3-1.7.3-android-apk-app-1.14-mb