Which tools, programs or apps can be used to distort a voice on the phone or display it more comfortably?

Are there any tools, programs or apps nowadays that can be used to display or distort your own voice on your smartphone, landline phone or notebook or PC in a more pleasant way or make them unrecognizable? Is it free or do you have to pay money for it? Who knows about it?

Yes will work. You have to google the rest. Only know a headset that uses different voices at the push of a button.

There are a few apps out there, but I would need to know which operating system you have there.

There are a few Python programs for recording. If you have a computer that is strong enough, you can safely rewrite it to do it in real time.

Android, Windows 7 and Windows 10.

Windows 10 Clownfish also works with Windows 7.
Android I have no idea I'm an IOS user

I plan to buy an iPhone this year. Which apps run easier on this operating system?