Whitehall Casebook not available on GooglePlay & Apple Store for Whitehall Mysteries

By Chiron70, in Letters from Whitechapel

In the Whitehall Mystery rulebook there is mention of Whitehall Casebook as an app on Googleplay and Applestore.

I could not find it on either. Does it have a different name, not yet released, or something else?

No response, Fantasy Flight?