Can't get the app for my Bluetooth headphones

[ziggyderek]

Can't get the app for my mascara Bluetooth headphones on my iPhone to update

 

[Ralston18]

What app are you using? Which iPhone?

Are you sure that there is an update?

What error message or other notice appears when the update attempt fails?

Where did you get the existing app - source? (Apple store, third party website?)