Descriptions : Volume Booster Pro for Android - App that allows you to increase the volume above the normal level. This is NOT a volume control, it is really a volume control. It should be able to boost your audio by about 500% (25 dB).
Required Android Versions : KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]