Constantinople is not a highly detailed, historically accurate simulation of the history of the Byzantine Empire, but is historically based and gives a sense of the real situation of the Byzantine Empire throughout its existence, and provides some insights into the history surrounding Constantinople and the Byzantine Empire.
App is optimized for phones but playable on tablets (just bigger).
Short gameplay video: https://youtu.be/lBMwh4gbDPw
Original board game design: Steve Ashing (https://boardgamegeek.com/boardgamedesigner/89972/steve-ashing)
Board game art: Ilya Kudriashov (https://www.flickr.com/photos/ilya_kudriashov/)
Music: "The Descent" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/
Other sounds: "Medieval Fanfare" tobyk (https://www.freesound.org/people/tobyk/sounds/26198/)
App is created with permission from original game designer and graphic artist.