Good ghostly voice changer app for ios?

[Silentarrow]

i'm looking to scare some friends . Anyone know a good app for this?

[Skeletonlord]

Just by searching for "Voice Changer apps" in the app store, within 2 mins, you can find the following app:
Scary Voice Changer by ALINA'S WEB DESIGN.
It costs 0.69p.

Quoted from app store:

"Have you ever wondered what your voice would sound like if it was a tad higher? Or have you wanted to play a prank on your friends, changing your voice around to make it sound different?"

I has the words "Play a prank on your friends" in it, and that is what you wanted to do.