What's the name of this app? 10 pointse?

[john]

The app where you can disguise your phone number as somebody else's. For example, if i'm calling my mom; i can disguise my number as my dads so when i call her she'll see my dads number instead of mine. I used to have this app a while back, forgot the name. Is this app still available or was it taken down? If it is still available, what's the name of it? Thanks.

[Casper]

If you are on a iPhone you can see you'r bought apps, there you can find it ^_^

And if you are on Android or something else it think you can do the same, but don't know.