Online I've found this list:

Pompei un giorno nel passato
Pompei Touch
Eros Pompeii
Pompei Maps and Walk
Pompei App
Visita Guidata di Pompei
Pompei Offline Map Travel Guide
Pompei Filmcards
iPompei
Le Lune di Pompei
Napoli Pompei Capri City guide

http://www.campuspompei.it/2015/02/2...-di-fruizione/

Browse them all till you find something.
Not all are in english.

If nothing suits you, I would go the good old way: book and reading. After all I suspect little has changed there in the last 2000 years