Aart Bik has finally made available the missing network version of CfA. The basic version is not new and was uploaded to Google Play long ago.
The network version is more useful to me thanks to the ability to play games between Android engines and remote engines installed on a Windows PC.
The description of the new features added in v5.2.5 is the following:
The new Modern and Russian sets will remind to most users the mobile version of Richard Lang's ChessGenius. It's not a coincidence because they are designed by Bryan Whitby, the same artist.
A notice from Bryan explains: "I initially designed both sets for Richard Lang's ChessGenius handheld computers. Richard still uses my original Modern set whilst Aart will use a slightly updated version. The Russian pieces were designed as an additional set for a recent ChessGenius update only Richard's are silver & black and Aart's are Brown & Silver."
Chess for Android is indeed more attractive with these new goodies. The network version is not available in Google Play but you can download the standalone installer HERE.
In case of trouble downloading from your PC, use your mobile device or refer to THIS POST.