To get started, just choose your favourite spooky mouth from our gallery of Halloween characters - including a fierce Pirate, a wicked Witch and a scary Zombie.
You can then bring your costume to life by holding your phone over your mouth and talking. Your spooky mouth will move in time with your own voice. Freaky!
If you want to give your voice a proper Halloween makeover then hold down the record button and say a message – you only have 8 seconds so make it snappy!
Then simply play back your spooky message to sound like your favourite Halloween character.
The FREE Spooky Speaker app is available now - download it if you dare!
Choose a spooky mouth to use as a mask.
Record a message to be altered to sound like a Halloween character.