The most popular Preferans online - free of charge and ads.
Extensive ingame stats and user comments require login through Apple Game Center, a social network or the main site.
Do not rely on negative comments by strangers. Try the game for yourself.
"Online Preferans" is actively played by around 4000 people monthly, from different platforms. At any moment of time 20-100 games are ongoing. Stats, ratings and comments by other players will help you to find suitable game partners.
Good luck!