Turn up the media volume by moving the slider to the right.
There are several options (including free apps) available fromGoogle Playand theApp Store.
Its worth testing out a few to see which you prefer the most.

AudioQuest
Some volume boosting app interfaces are simple and straightforward, while others can be complex and extravagant.
Some apps contain ads.
Some developers update their apps more frequently than others.

And, not all apps are compatible with every model or OS of a smartphone or tablet.
Some music and media player apps offer built-in volume-enhancing features.
However, there areconsequences of rootingandrisks of jailbreakingto consider.

It’s possible to permanently and irreversibly brick a phone.
For iOS,visit Cydia for third-party apps.
On Android, rooting opens up another set of options from audio mods and custom ROMs.

AudioQuest
Somecustom ROMscome with additional options, including sound options.
These are independent projects, so be careful what you flash.
There are also no guarantees that these projects will be maintained in the long term.

Anker
On newer iPhone models, the speakers are next to theLightning connectorport at the bottom.
Although locations can vary a bit with Android smartphones, the speaker is somewhere on the back.
But sometimes, as with some Android tablets, the speakers are found on the bottom.
Not all cases and covers are designed with optimal audio flow in mind.
This way, the audio or music wont be muffled by the resting surface.
Another option for a gadget with a rear-facing speaker is to lean it against something hard.
This way, the sound waves reflect back towards you instead of being aimed away.
This is particularly effective when watching a video since it’s possible for you to also see the screen.
The shape of the container redirects the sound waves in a focused pattern as opposed to an omnidirectional spread.
Since you cant see the sound waves, youll have to play around with the positioning a bit.
Results will vary based on the geometric shape of the container.
Some cases will either block the speakers or enhance them.
Products such as the Speck CandyShell Amped for smartphones and Poetic TurtleSkin for tablets provide sound amplification features.
As with sound-amplifying cases, these accessories redirect and channel sound so that its aimed at the listener.
Most are made of finished wood, although they are also made of plastic or silicone.
Some are compatible with only the iPhone and sometimes iPad.
Others are universal and work with select Android smartphones.
The better ones have cutouts for cables to plug in and charge the rig.
Some speakers, such as the Anker SoundCore Nano, are astonishingly loud for being so small.
Wireless earbuds are portable and discreet versus regular on-ear or over-ear sets of headphones.
For the absolute best sound quality, choose a top-notch pair of headphones paired with an external DAC.