The Apple IOS iphone/iPad has a soft mute, which can result in no sound coming from certain apps over your iphone/iPad speaker, even though volume is turned up and you can hear the sound with headphones.
For iOS version 10.x please read section iOS version 10 at the bottom of this page
This Soft Mute “feature” mutes app music and sounds, but not the audio from Hulu or Netflix. This makes it difficult to diagnose, especially since your headphones still work, but thankfully it is easy to fix.
To fix, follow the instructions below:
· Double tap the home button
· Swipe from left to right
· Tap the speaker icon to the far left
· It should show “Mute Off” below the play button
· Listen to app sound once again
This should fix the no sound from app by turning off the soft mute feature on the iPhone/iPad.
If you have difficulties getting the speaker icon to show while swiping from left to right you can also turn off the soft mute by following these steps: Go to Settings / General / "Use Side Switch to:"
Select "Mute" Then use the rocker switch on the side to turn up the sound.
If you have a iphone 5 or 6, Apple has changed how the mute works.
The uppere left hand side of the phone is a mute button Toggle it to get the sound to play.
Here are a few more steps you can also take:
iOS Version 10
Apple iPhone and iPad in iOS 10 have the ability to turn off sounds with simple motions and gestures. how to mute a iPhone and iPad in iOS 10.
The quickest and easiest way to mute the iPhone and iPad in iOS 10 is to use the volume control button on the left side of the smartphone. All you need to do is hold down the button until it switches to silent mode. Another method to put iPhone and iPad in iOS 10 into Silent mode is by just flipping the switch above the volume buttons “down” to mute the iPhone and iPad in iOS 10.
Reverse the above to turn off the mute deature.
If there is still no sound from the application, follow the link below for more steps.
Please visit the Apple support page https://support.apple.com/en-us/HT203794