Tomorrow, May 8th, Grepolis will be updated to version 2.23. Publishers InnoGames (The West, Tribal Wars) have said that there may be some downtime due to the update but it should not be too long and afterwards, players will get to enjoy the new features and changes.
One of the new features coming to Grepolis with tomorrow’s update is the invite a friend feature. This will allow you to invite your friends on Facebook to join in the action of world conquering in the free-to-play, browser-based strategy game.
Also, there may be some of you out there that take advantage of the relatively new mobile version of Grepolis. For you players, there is a nice change on the way that will let you achieve your daily login bonus just by logging into the mobile version. Now you can earn your bonus anytime, anywhere.
Source: Game homepage