The following apps are highly rated for their ability to enhance sound quality and are available for free on the Google Play Store .

Digital equalisation (EQ) is the process of adjusting the balance between frequency components within an electronic signal. For mobile users, an EQ app acts as a bridge between the limitations of hardware (like phone speakers or cheap headphones) and the intended sound of the artist. Equalizer & Bass Booster,Music - Apps on Google Play

: Known for its advanced controls, the free version includes a robust 10-band equalizer for those who want more control than a standard 5-band setup. White Paper: Optimising Mobile Audio with Equalisation

: Regarded as the top choice for audiophiles, it features over 3,000 pre-configured headphone profiles to automatically tune your audio to the Harman curve for optimal clarity.