What scheduling app allows clients to choose their own availability?

[jennywi]

Hi guys,

I am trying to find an app where I can send the link to the client and they can pick three availabilities on their own and the result gets sent to me again.

Does anyone know ?

Thanks!

[DealStyle]

I would love to get more details about that, 

We have a demo app that is similar 

[jennywi]

whats the name of the app??