Chess apps for Android & Facebook

[FICGS]

Hi all,

Did anyone test one of these new applications to play rapid/blitz through Android, Web or Facebook? What do you think about elo estimation?

English - https://playchess.app - Facebook - https://apps.facebook.com/playchess_app
... or Android ( https://play.google.com/store/apps/deta ... icgs.chess , or just search "playchess.app")
French - https://echecs.app - Facebook - https://apps.facebook.com/echecs_app
... or Android ( https://play.google.com/store/apps/deta ... cgs.echecs , or just search "echecs.app")
Portuguese - https://xadrez.app - Facebook - https://apps.facebook.com/xadrez_app
... or Android ( https://play.google.com/store/apps/deta ... cgs.xadrez , or just search "xadrez.app")
Spanish - https://jugarajedrez.app - Facebook - https://apps.facebook.com/ajedrez_app
... or Android ( https://play.google.com/store/apps/deta ... gs.ajedrez , or just search "jugarajedrez.app")

Cheers!